Answer:
The correct answer is option c "Proteins that are excreted by prokaryotes are synthesized on ribosomes that are bound to the cytoplasmic surface of the plasma membrane".
Explanation:
Many prokaryotes secrete proteins, particularly, extracellular enzymes that have a function outside the cells and toxins that are not needed by the cell. As any other protein, proteins that are excreted by prokaryotes are synthesized on ribosomes that are bound to the cytoplasmic surface of the plasma membrane. However, excreted proteins go to the general secretion (Sec) pathway, where they are tagged and further processed.
When prokaryotic bacterial cells undergo cell division, the single circular chromosome replicates to form a second chromosome. This new chromosome, like the original, attaches to the plasma membrane. Next, the plasma membrane pinches inward, and a cell wall forms across the middle of the cell to separate the two chromosomes and form two daughter cells. How does cell division in bacteria differ from mitosis in eukaryotes?
The diagram above represents an animal cell. What is the function of X?
It controls energy released.
It regulates the transport of materials.
It produces proteins.
It synthesizes cellulose.
Answer:
X in the diagram represents the cell membrane and performs the function of regulates the transport of materials.
Explanation:
The cell membrane, marked with X in the diagram, is a lipid bilayer with hydrophobic properties, which acts as a semi-permeable membrane to the passage of substances.
This membrane, that covers the cell and keeps it isolated from the extracellular space, has the function of controlling or regulating the passage of materials from the extracellular to the intracellular space, as well as the exit of substances from the interior of the cell. To fulfill this function it has several alternatives of transmembrane transport.
The other options are not correct because:
The cell membrane does not control the energy released. Protein synthesis occurs in the rugged endoplasmic reticulum. Cellulose synthesis occurs inside the cell, a process dependent on photosynthesis.Answer: it regulates the transport of materials
Explanation:
Use of synthetic fertilizers often leads to the contamination of groundwater with nitrates. Nitrate pollution is also a suspected cause of anoxic "dead zones" in the ocean. Which of the following might help reduce nitrate pollution? Use of synthetic fertilizers often leads to the contamination of groundwater with nitrates. Nitrate pollution is also a suspected cause of anoxic "dead zones" in the ocean. Which of the following might help reduce nitrate pollution? adding nitrifying bacteria to the soil using ammonia instead of nitrate as a fertilizer growing improved crop plants that have nitrogen-fixing enzymes adding denitrifying bacteria to the soil
Answer:
adding denitrifying bacteria to the soil
Explanation:
Denitrifying bacteria refer to microorganisms in soil that carry out the conversion of nitrates in soil to free atmospheric nitrogen.
Nitrogen gas (N2) is ultimately the product of denitrification of soil, however certain intermediate nitrogen species are also formed in the process. Some of these intermediates may include the following sequence of conversion; NO3− → NO2−→ NO + N2O → N2.
The chemical equation for denitrification is; 2 NO3− + 10 e− + 12 H+ → N2 + 6 H2O.
On which continent were fossils of both Glossopteris and Lystrosaurus discovered?
Australia
South America
Antarctica
North America
Answer:
C. Antarctica.
Explanation:
A Glossopteris typically refers to the largest and well known rank in the classification of seed ferns known as Glossopteridales.
Also, Lystrosaurus refers to the herbivorous rank in the classification of dicynodont therapsids typically originating from the late Permian and early Triassic epochs heavily built animals.
The continent on which fossils of both Glossopteris and Lystrosaurus were discovered is Antarctica.
Fossils are the remains of ancient life forms, which are preserved by natural processes. The fossils can be imprints, shells, and skeletons.
The fossils of Glossopteris and Lystrosaurus were discovered in Antarctica.
Glossopteris is one of the largest and best-known fossils of the seed ferns. The fossil of Glossopteris is important as it shows the evidence in the Permian period that ended 250 million years ago. The fossil of Glossopteris was discovered in Antarctica.
Lystrosaurus is an extinct genus that lived in the Permian and Early Triassic periods. It is a genus of herbivorous dicynodont therapsids. The fossils of Lystrosaurus were found in Antarctica and India.
Thus, the correct answer is Option C.
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Identify the characteristics of a virus
Imagine two closely related, but separate, species of fish reproduce and the hybrids offspring have higher fitness than either of the parent species. Given enough time, the most likely outcome will be: Group of answer choices The two original species will eventually fuse into a third new species, and disappear. The two original species will remain, and a third new species will appear. Nothing: the two original species will remain, and the hybrids will eventually disappear.
Answer:
The two original species will eventually fuse into a third new species, and disappear.
Explanation:
According to Darwin's theory of evolution, species that are better adapted to their environment have greater chances of surviving long enough to reproduce and pass on these favourable characteristics to their offspring. This is known as 'survival of the fittest'.
The original species lack the resilience of the new hybrid species hence the two original species will eventually disappear and fuse into the third specie.
g The first phase of the Calvin cycle is the (a)_____ phase. During this phase, a single CO2 molecule located in the (b)______ of the chloroplast gets fixed with (bonds with) a CO2-acceptor molecule called (c)_____ . This is a (d)_____ (number)-carbon molecule, which becomes an unstable 6-carbon molecule once it is carboxylated by CO2. This unstable molecule immediately splits into (e)______ (number) 3-carbon molecules called (f)_____ , which are the products of this phase of the Calvin cycle.
Answer:
a) Carbon fixation phase
b) stroma
c) Ribulose bisphosphate (RuBP)
d) 5-carbon molecule
e) two carbon molecules
f) glycerate-3-phosphate (GP)
Explanation:
In the Calvin cycle (also named C3 cycle or Calvin-Benson cycle), the CO2 is reduced in a cyclic process, where the first stable reaction product is 3-phosphoglyceric acid (3-PGA), a 3-C molecule, and the CO2 acceptor molecule is Ribulose bisphosphate (i.e., Ribulose 1, 5-diphosphate). The CO2 enters the chloroplast by passing through the stomata and diffusing into the stroma of the chloroplast, which is the site where sugar is synthesized. The Rubisco enzyme or RuBP carboxylase catalyzes the first step of the cycle (i.e., the attachment of CO2 to RuBP). The result of this reaction is an unstable 6C molecule, which breaks down into two 3C molecules named glycerate-3-phosphate (GP).
Andre said that all plants grow from seeds but you disagree. Explain how Andre is wrong in 1-2 sentences, and give an
example:
Answer:
I disagree
Explanation:
Because some plants don't grow from seeds like cassava.
Some plants don't bare fruits which contain seeds and use spores for example algae.
Match the definition/description with the correct term.
A. Character displacement B. Competitive exclusion
principle
C. Ecological niche ` D. Fundamental niche
E. Realized niche F. Resource partitioning
1. When two species compete for exactly the same resources (oroccupy the same niche), one is likely to be moresuccessful.One species outcompetes the other and eventually the secondspecies is eliminated
2. Some species coexist in spite of apparent competition for the sameresources. Closer study reveals that they occupy slightly different niches; dividing up the resources by pursuing slightly different resources or securing resources in slightly different ways.
3. Five species of warblers coexist in spruce trees by feeding on insects in different regions of the tree and by using differing feeding behaviors to obtain the insects
4. Niche shift
5. As a result of resource partitioning, certain characteristics may enable individuals to obtain resources in their partitions more successfully. Selection of these characteristics (or characters) reduces competition with individual in other partitions and leads to a divergence of features.6. Two species of finches that live on two different islands have similar beaks, both suited for using the same food supply (seeds). On a third island, they coexist, but due to evolution, the beak of each bird species is different. This minimizes competition by enabling each finch to feed on seeds of a different size.
7. The resources a population uses in the absence of competitors or under ideal circumstances
8. The sum total of the organismâs use of the biotic and abiotic resources in its environment
9. The resources a population actually uses
Answer and Explanation:
A. Character displacement: This refers to the change of a trait or characteristic. Two species that share the same space must develop different characteristics in order to reduce competition and make better use of resources.
5. As a result of resource partitioning, certain characteristics may enable individuals to obtain resources in their partitions more successfully. The Selection of these characteristics (or characters) reduces competition with individuals in other partitions and leads to a divergence of features.
6. Two species of finches that live on two different islands have similar beaks, both suited for using the same food supply (seeds). On a third island, they coexist, but due to evolution, the beak of each bird species is different. This minimizes competition by enabling each finch to feed on seeds of a different size.
B. Competitive exclusion principle: The competitive exclusion principle establishes that two or more species that share the same niche requirements and are in biological competition for the same resources, won´t be able to coexist indefinitely in the same space if the other ecological factors are constant. When the superior competitor occupies entirely the inferior competitor´s fundamental niche, the superior species has advantages over the other species and monopolizes all the resources. At this point, the inferior species is displaced and must adapt to use other resources changing its behavior, or must migrate to another area where it can get access to its needs, or get extinct.
1. When two species compete for exactly the same resources (or occupy the same niche), one is likely to be moresuccessful.One species outcompetes the other and eventually, the second species is eliminated
C. Ecological niche: The ecological niche is the synthesis of all the environmental factors that influence the growth, survival, and reproduction of species. These factors also include the interaction between species.
8. The sum total of the organismâs use of the biotic and abiotic resources in its environment
D. Fundamental niche: The fundamental niche refers only to physic conditions in which a species can live and survive in the absence of any interaction with other species.
7. The resources a population uses in the absence of competitors or under ideal circumstances
E. Realized niche: The realized niche refers to the restricted conditions in which a species can live and survive as a result of environment physic characteristics and the interaction with other species.
9. The resources a population actually uses
F. Resource partitioning: Resources partitioning refers to one dominant species monopolizing the resources, and the other inferior species use other resources -partially or completely-, migrates or get extinguished. A way in which species can divide resources is by living in different habitat areas. These species might eat the same food, and can roost in different places within the habitat. This resource partitioning and differentiation in the function of their physic location allows both species to coexist more effectively.
2. Some species coexist in spite of apparent competition for the same resources. A Closer study reveals that they occupy slightly different niches; dividing up the resources by pursuing slightly different resources or securing resources in slightly different ways.
3. Five species of warblers coexist in spruce trees by feeding on insects in different regions of the tree and by using differing feeding behaviors to obtain the insects
WILL MARK AS BRAINLIEST:
Microevolution is changes in the frequency of genes in a gene pool. According to this definition what is the smallest biological unit that can evolve?
The smallest biological unit that can evolve is population.
In order words, population is the smallest unit of living organisms that can undergo evolution.
What is population?Population can be defined as a group of living organisms of the same species interbreeding together in a particular area or environment
So therefore, the smallest biological unit that can evolve is population.
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Pls help I’m stresssingg :(((
Answer:
Noble gases are likely to be least reactive, because they have complete octet in their valence shell.
Halogens are likely to be most reactive, because they want only one electron to complete its octet in their valence shell.
Which of the following best describes the formation of the bond shown in Figure 1 ?
А
An ionic bond is formed between a carbon atom of one amino acid and the nitrogen atom of the other amino acid,
B
An ionic bond is formed when the negative charge of an OH group is balanced by the positive charge of a hydrogen ion.
с
A covalent bond is formed between a carbon atom and a nitrogen atom along with the formation of H2O
D
A covalent bond is formed that replaces the hydrogen bond between the OH group and the H atom,
A covalent bond is formed between a carbon atom and a nitrogen atom along with the formation of H2O.
HOW PEPTIDE BOND FORMS:
Peptide bond is a bond that forms when two amino acids comes together. It involves the fusion of the amino group of one amino acid (NH2) and carboxyl group of another (COOH) with the release of water (H2O). Peptide bond is a type of covalent bond because it involves sharing of electrons between a carbon atom (C) and a nitrogen atom (N).Therefore, in the reaction shown in the image attached, a covalent bond is formed between a carbon atom and a nitrogen atom along with the formation of H2O.
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Which chemicals are major contributing to ozone layer destruction?
Answer:
Chlorofluorocarbons (CFCs) and other halogenated ozone-depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. The total amount of effective halogens (chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine (EESC).
neurons are brain cells. where would new neuron come from
A bacteria
B non-living matter
C other cells
D food
Answer:
The answer is C!
Explanation:
Please list 3 separate facts about the 2 different types of changes in matter:
Which of the following best describes the process by which gas from the atmosphere is obtained by plants and used to build lipids?
A
Gas is fixed by plants as part of the sulfur cycle.
B
Gas is fixed by plants as part of the nitrogen cycle.
C
Gas is directly obtained by plants as part of the carbon cycle.
D
Gas is directly obtained by plants as part of the magnesium cycle
Answer:C
Explanation:They use energy from the sun to chemically combine carbon dioxide with hydrogen and oxygen from water to create sugar molecules.
The process by which gas from the atmosphere is obtained by plants and used to build lipids is best described by option C (Gas is directly obtained by plants as part of the carbon cycle).
The carbon cycle is the process that brings about the circulation of carbon compounds in nature.
Carbon exists in nature as the gas carbon dioxide which makes up 0.03% of air.
The plants uses carbon dioxide in a process called photosynthesis to manufacture their own food (glucose).
Excess glucose produced by plants, are converted to substances such as starch and lipids, which are then stored in various parts of plant.
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An acronym to assist in
remembering the 6 major micro-
nutrients is
A. CITES
B. PORK CHOP
C. P-CHOP
D. N-CHOPS
Answer:
C
Explanation:
How does cellulose affect the cell wall in plants?
a)Cellulose is the material used to keep the cell wall rigid.
b)Cellulose allows water to pass through the cell wall.
c)Cellulose allows light to pass through the cell wall.
d)Cellulose prevents water loss in plants.
Answer:
a)Cellulose is the material used to keep the cell wall rigid.
Explanation:
5. Your grandmother in Ireland sends you her favorite cookie recipe. Her instructions say to bake the cookies at 190 °C. To what Fahrenheit temperature would you set the oven to bake the cookies?
Answer:
374 F
Explanation:
What is the purpose of cellular respiration ?
Plz answer ASAP got a test due
Answer:
To withdraw ATP from food
Explanation:
1. Why are viruses considered nonliving but bacteria are considered living? Give two reasons. (1 point)
Answer:
-Viruses cannot replicate.
-Viruses do not need to consume energy to survive or regulate its own temperature.
Explanation:
<3
Viruses are not able to replicate or carry out any of the functions of living cells on their own. They rely on the machinery of the host cell in order to replicate and produce new viruses, and they are not able to carry out functions such as metabolism, growth, or reproduction on their own.
Why viruses are considered non-living?Viruses are much simpler in structure than bacteria and other living cells. They do not have a true cell structure or any of the characteristic cell organelles found in living cells, such as a nucleus, mitochondria, or endoplasmic reticulum. Instead, they are composed of a small piece of genetic material (either DNA or RNA) surrounded by a protein coat.Learn more about viruses, here:
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What two body parts must be cleaned before food preparation
Answer:
hand and arms
Explanation:
Wet hands with running water, (at least 1000F)
Apply soap.
Vigorously scrub lathered fingers, fingertips, and between fingers. And scrub hands & arms for at least 10-15 seconds.
Rinse under clean running water.
Dry clean hands/arms.
Hands and arms must be cleaned before food preparation. Thus option B is correct.
what is personal hygiene for food preparation ?Good personal hygiene can prevent food poisoning.
Bacteria that cause food poisoning can be found in anyone, even healthy people. If you touch your nose, mouth, hair or clothes before touching the food, you can transfer germs from yourself to the food.
Washing your hands well can reduce the risk of contaminating food with bacteria.
Wash your hands with warm water and soap, and don't forget the backs of your hands and wrists, between your fingers and under your nails.
Dry hands well immediately after washing. Always dry your hands with a clean towel or disposable paper or under a dryer.
Therefore, we must keep our hands and arms clean before food preparation. Thus, option B is correct.
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Your question is incomplete, but most probably full question was,
What two body parts must be cleaned before food preparation?
A. Hands and face
B. Hands and arms
C. Arms and face
D. Arms and ears
Which scenarios is the best example of positive feedback?
Explanation:
As Body temperature decreases, your body begins to shiver and you begin to sweat.
please follow meWhich of the following happens when a phosphate-phosphate bond in an ATP molecule
is broken?
Lysosome contents are released in a cell.
Energy is released in a cell.
Water is transported into an animal cell
Light energy is absorbed in a plant cell.
Answer:
An event that occurs when a phosphate-phosphate bond is broken in ATP is that energy is released in a cell.
Explanation:
Adenosine triphosphate or ATP is the molecule in charge of providing energy to the cell, which is necessary to perform its functions.
The energy contained in ATP depends on the high-energy bonds that bind the phosphate groups to the energetic nucleotide molecule. Through the hydrolysis of ATP, phosphate is separated from ATP, obtaining ADP, and a large amount of energy is released. This energy serves for the cell to perform its metabolic functions.
The other options are not correct because:
Lysosomes act on cellular digestion. Transport of water into the cell occurs by osmosis, through aquaporins. Light energy is absorbed in a plant cell, through photosynthesis.Read each question carefully. Write your response in the space provided for each part of each question. Answers must be written out in paragraph form. Outlines, bulleted lists, or diagrams alone are not acceptable and will not be scored.
The diagram shows water molecules as solid ice at 0°C
and as a liquid at 25°C.
The complete question is as follows:
The diagram shows water molecules as solid ice at 0°C and as a liquid at 25°C. Explain why the arrangement of water molecules is different in ice and water.
Answer:
In low temperatures, hydrogen bonds between water molecules become stable as a result of the movement of these molecules are slow in low temperature which leads to the crystalline form of water due to hydrogen bond. This crystalline form is ice.
on the other hand at a higher temperature water molecules found in liquid form due to the faster and rapid movement of water molecules as hydrogen bonds keep breaking and forming in this setting.
How can a change in technology affect scientific knowledge?
O It makes instruments cheaper to produce and buy.
O It makes vaccines quicker and cheaper to produce.
It reduces the time that is needed to make new discoveries.
O It leads to changes in existing scientific information.
Answer:
(D)
Explanation:
Credit to isaacazamora for the answer, I'm just making it easier to see.
A change in the technology affects the scientific knowledge because it leads to changes in the existing scientific information. Thus, the correct option is D.
What is Scientific knowledge?Scientific knowledge refers to a generalized body of all the laws and theories used to explain a phenomenon or the behavior of interest which are acquired using the scientific methods. The laws are observed patterns of the phenomena or behaviors which are observed, while theories are systematic explanations of the underlying phenomenon or behavior of something.
A change in the technology can affect scientific knowledge through opening up a new branch of the scientific investigation. The invention of the microscope enabled many biologists to study living organisms which are invisible to the unaided eyes and thus also gave birth to the science of microbiology.
Therefore, the correct option is D.
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what amino acids are non degenerate?
Answer:A position of a codon is said to be a non-degenerate site if any mutation at this position results in amino acid substitution. ... There are three amino acids encoded by six different codons: serine, leucine, and arginine. Only two amino acids are specified by a single codon each.
Explanation:I'm kinda confused about your questions, I think this is what your asking for. Hope this helps, if not. I'll try redoing it! :))
A student uses paper towels to clean up a small chemical spill in the lab. Where should the dirty paper towels be placed?
Answer:
The dirty paper towel should be placed in the trash can that is for chemicals and other things that are not healthy for the environment.
The energy required for photosynthesis is provided by
O chlorophyll.
O sunlight
O protein.
O carboh rates.
sunlight..........................
Answer:
Sunlight
Explanation:
Photosynthesis has two main parts (light-independent and light dependent). Which descriptions can BEST be used to explain photosystem I and photosystem II?
Answer:
Explanation:
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