Plastids are organelles found in plant cells, but not in animal cells. Here option A is the correct answer.
Plastids are membrane-bound structures that play a crucial role in the storage and synthesis of food in plant cells. There are several types of plastids, including chloroplasts, which are responsible for photosynthesis, and leucoplasts, which are involved in the synthesis and storage of starch, fats, and oils.
Centrioles, on the other hand, are present in animal cells but not in plant cells. Centrioles are cylindrical structures that are involved in cell division and the formation of cilia and flagella.
The endoplasmic reticulum (ER) is found in both plant and animal cells and plays a key role in the synthesis and folding of proteins and lipids. The ER is an extensive network of flattened sacs and tubules that is interconnected with the Golgi apparatus and the nucleus.
Complete question:
which organelles are found in plant cells but are not found in animal cells?
A - plastids.
B - centrioles.
C - endoplasmic reticula.
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the native state of a protein is most often near the bottom of the protein folding funnel. is this true?
The given statement, "The native state of a protein is most often near the bottom of the protein folding funnel," is true because the least energy and most stability is at the bottom and the native state is the most stable state of protein.
The folding funnel hypothesis of proteins states about the folding of proteins which states that the native state or the completely folded state of the protein has the least free energy in it. The hypothesis was laid down by Anfinsen.
Proteins are the biomolecules made up of amino acid monomers joined together by the peptide bonds. The proteins are very essential in the living body as they perform majority of the functions like catalysis, structural, signaling, etc.
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What term is used to describe the two versions of a gene for a characteristic?
Alleles are the terms used to describe the two distinct versions of a gene for a particular feature.
What do alleles do?Each variation, known as an allele, in a DNA sequence (a single base or a segment of bases) at a specific genomic region may have two or more forms. A person inherits two alleles, one from each parent, for each area of the chromosome where such variation exists. If the two alleles match, the person has homozygosity for that allele.
If the alleles are distinct, the person is heterozygous. In our language, "alleles" refers to the variant form(s) or variants of a gene. Since one allele is produced by each autosomal gene and is inherited from each parent, we frequently categorize the alleles. Alleles of the normal or wild type, abnormal or mutant, or both, are terms that are frequently used to describe them.
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asl100 what structure turns sound waves into mechanical waves? the ossicles. the external auditory meatus the tympanic membrane. the organ of corti.
Sound waves to enter the ear go through the external auditory canal before they strike the eardrum and cause it to vibrate. The malleus, one of the three small bones in the middle ear, is connected to the eardrum.
How is a mechanical wave produced?A disruption and vibration of matter, either solid, gas, liquid, and plasma, is what generates mechanical waves. A medium is described as material through which waves are propagating. Sound waves are created by vibrations inside a gas, while water waves are created by vibrations inside a liquid (air).
What use does the tympanic membrane serve?It divides the middle ear from the outer ear. The tympanic membrane vibrates as sound waves enter it. The middle ear's minuscule bones are thus exposed to the vibrations. The vibrating signals are then sent from the eardrum bones to the inner ear.
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If a pea plant were homozygous recessive for height, how would its alleles be represented?
The alleles for a homozygous recessive pea plant for height would be represented as tt.
In pea plants, the allele for height is determined by the gene T.
The dominant allele (T) codes for tall plantsThe recessive allele (t) codes for short plants.Homozygous refers to an organism that has two identical copies of a particular gene, one from each parent. When an organism is homozygous recessive for a trait, it means that it has two copies of the same recessive allele (in this case, tt). This results in the expression of the recessive trait (short height).
Key points:
In pea plants, the gene for height is determined by the T allele.The dominant allele (T) results in tall plants and the recessive allele (t) results in short plants.Homozygous refers to an organism having two identical copies of a gene, one from each parentHomozygous recessive refers to an organism having two copies of the same recessive allele (in this case, tt)The expression of the recessive trait (short height) results from the presence of two copies of the same recessive allele.Learn more about alleles here:
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Immune and inflammatory responses are more pronounced in tissues that are highly vascularized. a. True
b. False
This statement is true. Immune response and inflammatory responses are more pronounced in tissues that are highly vascularized.
Vascularization is the term used to describe a tissue that has a substantial blood vessel network. Blood vessels are essential for both the elimination of waste materials and the delivery of oxygen and nutrients to tissues. Additionally, they offer an essential route for immune cells to access pathogens or tissue damage and react.
Skin, mucous membranes, and several internal organs are examples of highly vascularized tissues that have more immune cells and a stronger immune response than tissues with less vascularization. This is due to the fact that these tissues' extensive network of blood arteries enables the quick delivery of immune cells to areas of infection or injury, resulting in a more prompt and efficient immune response.
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How are Easter Island and The Lorax different?
Easter Island and The Lorax are different in several ways.
Easter Island is a real place located in the Pacific Ocean and is famous for its mysterious stone statues called Moai. It is believed that the island was once home to a thriving civilization that fell into decline and disappeared.The Lorax, on the other hand, is a fictional character created by Dr. Seuss. The Lorax is a small, orange, mustached creature who speaks for the trees and is an environmental advocate. The story of The Lorax is a cautionary tale about the consequences of environmental destruction and overconsumption.What else should you know about Easter Island?Here are some other facts about Easter Island:
History: Easter Island has a rich cultural history, and its people, the Rapa Nui, have a unique cultural heritage that includes a sophisticated system of writing, a distinctive art style, and complex religious beliefs.Moai Statues: Easter Island is perhaps most famous for its massive stone sculptures, known as Moai, which have fascinated visitors for centuries. The Moai are large, monolithic statues that can reach up to 33 feet (10 meters) in height and are believed to have been carved between the 12th and 16th centuries.Deforestation: Easter Island was once covered in lush forests, but over time, the Rapa Nui deforested the island, likely due to the demands of a growing population and their need for wood to transport the Moai. This deforestation had a major impact on the island's ecosystem and contributed to its current state as a barren, windswept island.Learn more about Easter Island here;
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can you place these events from the evolutionary history of life on a time line? part a drag each event in the evolutionary history of life on earth to its proper location on the time line.
The event occurred in the evolutionary history of life on Earth, in its proper location on the time line:
Origin of Earth 4.6First life 3.5Eukaryotes 2.1Multicellular life 1.2First animals .6Life moves on Land .5Humans .02Life on Earth has evolved over billions of years through a process of natural selection, where organisms with advantageous traits survive and reproduce. Because of this process, there are many different kinds of life on Earth today, from simple single-celled organisms to complex multicellular life.
The Earth was formed about 4.5 billion years ago through a process called accretion. Scientists estimate that the first forms of life appeared on Earth about 3.5 to 4 billion years ago. These were single-celled microorganisms known as prokaryotes.
The first animals appeared about 600 million years ago, during the Cambrian explosion. Land-dwelling animals first appeared about 360 million years ago, during the Devonian period. Humans belong to the family of primates, and first appeared about 2.8 million years ago.
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Both carrier and proteins are involved in the transport of molecules across the cell membrane.a.Trueb. False
Answer: True
Explanation: Carrier proteins and channel proteins are the two major classes of membrane transport proteins. Carrier proteins (also called carriers, permeases, or transporters) bind the specific solute to be transported and undergo a series of conformational changes to transfer the bound solute across the membrane
Which of these actions is an unsustainable practice?
A. Expanding the amount of fossil fuels extracted from an area
о B. Selling locally caught fish in a local market
C. Selling extra carbon credits on an international carbon market
D. Limiting the number of fish harvested in an area
A. Expanding the amount of fossil fuels extracted from an area is an unsustainable practice. This action can lead to depletion of nonrenewable resources, environmental damage, and contribute to climate change.
What is Carbon Market?
A carbon market is a system where companies and governments can buy and sell carbon credits, which represent the right to emit a certain amount of greenhouse gases. The goal of a carbon market is to reduce greenhouse gas emissions by creating a financial incentive for entities to reduce their carbon footprint. Entities that emit fewer greenhouse gases than their allotted amount can sell their unused credits to entities that exceed their allotted amount. Carbon markets can be regional, national, or international in scope. The largest carbon market is the European Union Emissions Trading System (EU ETS), which covers more than 11,000 power stations and industrial plants in 31 countries.
An unsustainable practice refers to an activity or behavior that is harmful to the environment and cannot be maintained over a long period of time without causing damage. The correct answer to the question is A, expanding the amount of fossil fuels extracted from an area. The reason for this is that the extraction and burning of fossil fuels contribute to climate change and environmental degradation, and their use is not sustainable in the long run.
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explain how an activated oestrogen receptor affects the target cell
Answer:
An activated estrogen receptor (ER) can affect a target cell by binding to specific DNA sequences, called estrogen response elements (EREs), located in the promoter region of target genes. This binding results in the recruitment of co-activators, leading to the transcriptional activation of target genes, which encode for various proteins that regulate cellular processes such as cell proliferation, differentiation, and apoptosis. Activated ER can also modulate gene expression through its interaction with other transcriptional regulatory proteins. The net effect of these processes on the target cell is ultimately determined by the specific context and the balance between the positive and negative regulators of ER signaling.
The activated estrogen receptor plays a critical role in regulating gene expression in cells, leading to changes in cellular behavior and physiology. By understanding how the activated estrogen receptor affects the target cell, we can gain insight into the mechanisms of estrogen-mediated signaling and the development of diseases that are associated with the dysregulation of this pathway.
The estrogen receptor (ER) is a protein that binds to the hormone estrogen and plays a critical role in regulating gene expression in cells. When estrogen binds to the ER, the receptor undergoes a conformational change, leading to the activation of downstream signaling pathways that ultimately affect the behavior of the target cell. In this response, we will discuss in detail how an activated estrogen receptor affects the target cell.
When estrogen binds to the estrogen receptor on the surface of a cell, it causes a conformational change in the receptor, which allows it to dimerize with another ER molecule. This dimerization activates the estrogen receptor and allows it to enter the nucleus, where it binds to specific DNA sequences known as estrogen response elements (EREs). This binding initiates a cascade of events that leads to changes in gene expression in the target cell.
The activated estrogen receptor acts as a transcription factor, which means that it regulates the expression of specific genes in the target cell. It does this by recruiting co-activators or co-repressors to the EREs, which either enhance or inhibit gene expression, respectively. The specific genes that are affected by the activated estrogen receptor depend on the type of cell and tissue in which the receptor is expressed.
The effects of an activated estrogen receptor can be either short-term or long-term. Short-term effects include rapid changes in cellular behavior, such as changes in ion transport, cell signaling, and metabolism. These effects are often mediated through the activation of signaling pathways such as the MAPK/ERK pathway or the PI3K/Akt pathway.
Long-term effects of an activated estrogen receptor include changes in the expression of genes that are involved in cell growth, differentiation, and survival. These changes can have profound effects on the physiology of the target cell and can contribute to the development and progression of diseases such as breast cancer.
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the 4 main groups of biological macromolecules are nucleic acids, , carbohydrates, and proteins. True/False ?
Answer:
true
Explanation:
carbohydrates, lipids (or fats), proteins, and nucleic acids
the capillaries of the pulmonary circulatory system a. deposit carbon dioxide into the alveoli. b. receive oxygen from the alveoli. c. surround the alveoli. d. all of the above
The capillaries of the pulmonary circulatory system d. all of the above.
In general , the capillaries contains the blood that give off carbon dioxide through the capillary wall inside the alveoli and in exchange takes up oxygen from the air inside alveoli. Also , the walls of the alveoli share a membrane with the capillaries. This association helps easy oxygen and carbon dioxide diffusion between the respiratory system and the bloodstream. They also Oxygen molecules attach to red blood cells, that travel back to the heart.
Also , Carbon dioxide travels from the capillaries and goes around the alveoli into the alveoli. Then carbon dioxide travels up the bronchioles to the bronchi, and from trachea they are exhaled. Hence pulmonary circulation involves all of the above mentioned options .
Hence , D is the correct option
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a complex of two dna polymerase holoenzymes that move as a unit during dna replication is described as
Answer:D N A replication begins at the origin of replication on a circular bacterial chromosome. Replication forks move bidirectionally. Eventually, the replication forks meet on the other side of the circular chromosome, and replication ends, resulting in two circular bacterial chromosomes. The micrograph shows a circular bacterial chromosome that is partially replicated.
Origin of Replication
The enzyme that converts a double-stranded DNA region into two single strands by breaking the hydrogen bonds between the strands is called DNA____?
helicase
Parental DNA strands are used as templates to produce daughter DNA strands during the process called
Explanation:
outer surface of the eye that both protects the eye and begins the focusing process
The outer surface of the eye protects the eye and begins the focusing process is the cornea.
The corneа is the cleаr window аt the front of the eyebаll thаt аllows light to enter the eye. It is continuous with the sclerа. Most of the focusing of light hаppens аt the corneаl surfаce/teаr film. Аs this outer lаyer of the eye is so criticаl for sight, there аre mаny nerve endings in the corneа mаking it the most sensitive pаrt of the eye to touch. The outer-most lаyer is the epithelium: а smooth surfаce to trаnsmit light with tightly lаyered cells difficult for infections to penetrаte.
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how simple or even how complex can a phylogenetic tree become? is it commonly known and used among the scientific community or just something for representation?
Phylogenetic trees can become very complex depending on the type of data being represented. Generally, the more data that is available, the more complex the tree can become.
What is Phylogenetic?Phylogenetic is the study of the evolutionary relationships between organisms. It is used to reconstruct the evolutionary relationships between species, and to understand how features of living organisms have evolved over time. Phylogenetic analysis uses molecular and morphological data to identify similarities and differences between species and to trace the evolutionary history of a group of organisms.
In scientific studies, phylogenetic trees are used to represent the evolutionary relationships between species, and they can be extremely complex due to the vast amount of data that is available. Phylogenetic trees are commonly used in the scientific community to understand the relationships between different species.
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which of the following is an example of an ultra-processed food? group of answer choices swiss cheese chicken nuggets sunflower seeds skim milk apple juice
The following which is an example of an ultra-processed food is chicken nugget and is therefore denoted as option B.
What are Ultra-processed food?
This is referred to as ultra-processed food products, are food and drink products that have undergone specified types of food processing and it is done mostly by big companies.
Chicken nugget is a food product consisting of a small piece of deboned chicken meat that is breaded or battered, then deep-fried or baked as a result of the different processing which involves the extraction of foods, such as fats, starches, etc and is therefore the reason why it was chosen as the correct choice.
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with the term 'spondylolisthesis' if the combining form is spondyl/o meaning 'vertebra' what is the suffix and how does it translate? group of answer choices -listhesis; slipping -esis; a procedure -listhesis; abnormal condiiton -esis; study of
The combining form "spondyl/o," which means "vertebra," and the suffix "-listhesis," which means "slipping," make up the term "spondylolisthesis."
Spondylolisthesis is a condition that causes one vertebral body to slide forward or backward in relation to the vertebrae above or below it in medical terms. This could be brought on by a birth defect, an injury, or spine degeneration. Depending on the severity of the slip, the condition can result in nerve compression, back pain, and other symptoms. Although it can occur anywhere along the spine, most often in the lower back.
Therefore, "spondylolisthesis" translates to "vertebral slipping."
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Below, two daughter cells that resulted from a normal meiosis I are shown.
Drag the correct results of nondisjunction occurring in both daughter cells during meiosis II.
Non-disjunction occurs when chromosomes do not get to segregate independently from each other during meiosis I or II. In the exposed example, since non-disjunction occurs in both cells, there will be two gametes with two chromosomes (n+1) and two gametes with no chromosomes (n-1).
What is non-disjunction?Non-disjunction is the proper separation failure of chromosomes during anaphase I or II of the meiotic division.
This mistake in segregation results in the production of gametes containing a greater or lesser number of chromosomes than is found in a normal cell. Consequently, the individual may develop a trisomy or monosomy.
Non-disjunction is a cause of various abnormal medical conditions, including Down syndrome and Turner syndrome.
In the exposed example, non-disjunction occurs in both cells during meiosis II.
Two of the gametes will have two chromatids (n+1).The last two gametes will have no chromatid (n-1).The affected gametes result in trisomy and monosomy after fecundation.
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Are the oca2 and gey genes genetically linked? why or why not?
The OCA2 and MC1R genes are not necessarily genetically linked, meaning that they are not located on the same chromosome and are not inherited together as a single unit.
However, both genes play a role in determining the color of a person's hair, skin, and eyes. The OCA2 gene is located on chromosome 15 and is responsible for the production of melanin pigment in the iris, hair, and skin.
Variations in this gene can lead to differences in the amount and type of melanin produced, which in turn affects hair, skin, and eye color. The MC1R gene, on the other hand, is located on chromosome 16 and is responsible for determining the type of melanin produced in the skin.
Variations in this gene can result in differences in skin color, as well as the type of melanin produced, which can affect hair and eye color. Both genes interact with each other and with other genes to produce a person's overall hair, skin, and eye color.
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the glial cell that myelinates and insulates axons within the cns is the ..a. astrocyteb. ependymal cellc. neurolemmocyted.microglial celle. oligodendrocyte
The glial cell that myelinates and insulates axons within the cns is the e. oligodendrocyte
In the central nervous system of jawed vertebrates, oligodendrocytes, also known as oligodendroglia (from the Greek meaning "cells with a few branches"), play a role similar to that of Schwann cells in the peripheral nervous system in supporting and insulating axons. To do this, oligodendrocytes produce the myelin sheath.
A single oligodendrocyte may extend its processes to 50 axons, encasing each axon in a myelin sheath that is around 1 m in diameter. Schwann cells, on the other hand, can only encircle one axon. For multiple nearby axons, each oligodendrocyte creates one length of myelin.
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Full Question: The glial cell that myelinates and insulates axons within the cns is the ..
a. astrocyte
b. ependymal cell
c. neurolemmocyte
d.microglial cell
e. oligodendrocyte
30 POINTSSS AND RLLY EASY PLS HELP
Fill in the blanks with the correct cell division phase
Thank you so much
There are five stages in total: prophase, prometaphase, metaphase, anaphase, and telophase. The final physical cell division after telophase, cytokinesis, is sometimes referred to as the sixth stage of mitosis.
What transpires throughout the three phases of cell division?
The cell cycle has three stages: Stage 1: The cell enlarges, the DNA is copied, and new organelles are produced. Stage 2: Mitosis, in which the cell's nucleus divides. In stage three, the cell divides into two exact daughter cells.
Condensin is recruited during prophase, the first phase of mitosis, and the condensation process begins. This process lasts until metaphase.
Prometaphase is initiated by the abrupt division of the nuclear envelope into numerous tiny vesicles, which will later be divided between the ensuing daughter cells.
Chromosomes then attain their most compacted state during metaphase, when all of the cell's chromosomes align at the spindle's equator.
As cells move from metaphase into anaphase, sister chromatid separation occurs suddenly.
Mitosis comes to an end at telophase, which is the time when the chromosomes reach their poles. The chromosomes then begin to decondense into their interphase conformations as the nuclear membrane heals. After telophase, there is a process known as cytokinesis in which the cytoplasm is divided into two daughter cells. This process results in daughter cells, which have the same genetic make-up as the parent cells.
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what are sperm cells and egg cells known as in the scientific community?
Answer:
Gametes are an organism's reproductive cells. They are also referred to as sex cells. Female gametes are called ova or egg cells, and male gametes are called sperm. Gametes are haploid cells, and each cell carries only one copy of each chromosome.
Explanation:
Hopefully this is the answer you are looking for.
Molecule 1 has the following sequences of bases: AAGCTC.
Which set of bases in Molecule 2 will bond to this sequence in a complementary way?
A) UUCGAG
B) TTCGAG
C) GGATGT
D) CCUAGA
Amylose differs from amylopectin in that amylose ________.
Amylose differs from amylopectin in that amylose forms a helix and no branch points.
Starch is basically a colorless as well as an odorless polysaccharide which is found in the plants and is as stored carbohydrates. It is basically a polymer that is composed of a number of glucose monomers which are linked with each other in order to form a polysaccharide.
Starch is basically composed of two types of polysaccharide molecules which are amylose and amylopectin. Amylose differs from amylopectin in that amylose forms helix and has no branch points. Also, amylose is soluble in water whereas amylopectin is not soluble in water.
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describe the structural changes that occur when a pure phospholipid bilayer is warmed and passes through its transition temperature. explain what would happen if the bilayer contained a significant amount of cholesterol.
Phospholipid bilayer fluidity rises with temperature. At lower temperatures, the kinetic energy of the phospholipids in the bilayer is reduced, and they cluster closer together, enhancing intermolecular interactions and lowering membrane fluidity.
How does the phospholipid bilayer's structure relate to its purpose?Important elements of cell membranes are phospholipid bilayers. A barrier preventing molecules and ions from entering and leaving the cell is the lipid bilayer. The ability to selectively permit the passage of certain molecules into and out of cells, however, is a crucial function of the cell membrane.
The van der Waals contacts get stronger as the hydrocarbon length grows, which means it takes more energy to disturb the orderly packing and raises the phase transition temperature.
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There were 22 ice fishing shack on a lake each shack had a 9 pound of firewood firewood were sold in 3 pound bundles how many bundles were there in all
There were 66 bundles of firewood in total.
There were a total of 22 shacks, and each shack had 9 pounds of firewood. So the total amount of firewood is:
22 × 9 = 198 pounds.
Since firewood was sold in 3-pound bundles, we can find the number of bundles by dividing the total amount of firewood by 3:
198 pounds / 3 pounds/bundle = 66 bundles.
An ice fishing shack is a small shelter or structure used by ice fishermen on frozen lakes or rivers to protect themselves from the elements while fishing. The shacks are usually made of wood or metal and can be dragged onto the ice using sleds or trailers.
They often have holes in the floor to allow for fishing through the ice, as well as heaters or stoves to keep the interior warm. Ice fishing shacks come in a variety of sizes and styles, ranging from simple one-person tents to large, fully-equipped cabins.
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What is the name of a complex group of organisms that are connected and interact with on another
Answer:The name for a complex gruop of organisms that are connected and interact with one another is "system." Systems can be found all over the animal kingdom. Most of the time, the organisms that belong to a particular system cooperate and collaborate with each other in order to remain healthy and safe. Moreover, systems tend to be very structured, and dedicated to the maintenance of balance within it.
Explanation:
structurally, mitochondria are similar to modern-day prokaryotes in several ways, that include all but the presence of
The structure of mitochondria is similar to that of modern-day prokaryotes in all of the ways except for the presence of: (4) ribosomes.
Mitochondria is the double membranous cell organelle present in the eukaryotic cells. It is known to have prokaryotic origin. Since the mitochondria itself is a cell organelle, that is why it does not possess any ribosomes.
Ribosomes are the cell organelles present in both prokaryotes and eukaryotes. They can be of two types: 70S and 80S. The ribosomes are involved in the synthesis of proteins and are found abundantly in the cytoplasm of the cell. In eukaryotes they are found in the endoplasmic reticulum as well.
The given question is incomplete, the complete question is:
Structurally, mitochondria are similar to modern-day prokaryotes in several ways, that include all but the presence of
DNA of their own. double membrane.proteins on the membrane.ribosomes.To know more about mitochondria, here
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chapter 27 according to the endosymbiosis theory, what are the origins of the inner and outer membranes of mitochondria?
According to endosymbiosis theory,the inner membrane of mitochondria is gotten from the first bacterium, and the outer membrane is gotten from the host cell that overwhelmed the bacterium by endocytosis.
Mitochondria are membrane bound organelles encased by a twofold film.They have a smooth external layer encasing the organelle and a collapsed inward film. The folds of the internal membrane are called cristae, the particular of which is crista, and the folds are where the responses making mitochondrial energy happen.
The inner membrane contains a liquid called the matrix while the intermembrane space situated between the two layers is likewise loaded up with liquid. Due to this somewhat basic cell structure, mitochondria have just two separate working volumes: the grid inside the inward layer and the intermembrane space. They depend on moves between the two volumes for energy generation.
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What would happen If I explored two oceanic plates at a convergent boundary?
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
The activity which would happen If I explored two oceanic plates at a convergent boundary is an earthquake.
What is an Earthquake?This is referred to as the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves.
At a convergent boundary between two plates of oceanic lithosphere, it has been observed that the older, denser oceanic plate will always subduct, which will cause earthquakes and form volcanic isles thereby making it the correct choice in this scenario.
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