Answer: A cell organelle is defined as a cellular structure which has a specific function. The structure and function of these organelles as explained below.
Explanation:
--> NUCLEUS: This is the largest and most important cell organelle. It is enclosed by a double- layered nuclear membrane with many pores. The structure of the Nucleus makes it the 'control center' of the cell. This, it contains genetic materials( chromosomes) which controls the Production of a new cell or the whole organism itself and it controls the type and quantity of proteins( enzymes) produced in the cytoplasm.
--> ENDOPLASMIC RETICULUM(ER): this is a system of membrane-lined sacs that form channels throughout the cytoplasm. It's membrane is continuous with the nuclear membrane. There are two types of endoplasmic reticulum: rough and smooth. The rough ER packs and transports proteins made by ribosome while the smooth ER is involved in lipid and steroid synthesis.
--> GOLGI BODY: This is a stack of membrane-lined sacs. It is continuously formed at one end and broken off as bubbles or vesicles at the other end. These vesicles carry 'export materials' like enzymes and hormones which the cell makes.
--> MITOCHONDRIA: This is a sausage-shaped body surrounded by a double-membrane layer. The inner membrane is folded to form partitions which project into the inside of the mitochondria. The energy producing reactions of cellular respiration take place in the mitochondria. It is thus often called the cell's 'power- house'.
LYSOSOMES: These are small round sacs that contains digestive enzymes which break down structures and substances. They are also involved in the transport of materials in and out of the cell.
RIBOSOME: These are found on the surface of rough endoplasmic reticulum and are sites for protein synthesis of the cell.
CENTRIOLE: Two rod-like centrioles are found at right angles to each other in an animal cell. They are found near the nucleus and seem to be concerned with cell division.
What is seed technology?why is still considered as one of the major subject in agriculture?
Like DNA, RNA follows base-pairing rules. Experiment to find which RNA _____________ on the right side of the Gizmo will successfully pair with the thymine at the top of the template strand of DNA.
Answer: Nucleotide; Adenine
Explanation: RNA Nucleotide contains bases of Thymine, Cytosine, Guanine and Uracil. The Uracil base in RNA, substitute the base Thymine in the DNA base and bonds with Adenine like as seen in DNA base pairing.
Thus, during DNA duplication, the thymine at the top of the template strand of DNA is replaced with Uracil and binds with Adenine.
Activated macrophages and neutrophils release cytokinin, signaling molecules that enhance the immune response Select one: True False
its true that cytokinin released by macrophages boost immunity
Which bone is identified in the picture below?
O A. Cranium
O B. Radius
C. Metacarpal
D. Sternum
Answer:
B) Radius
Explanation:
By the way for some people this question will have different answers so.. yeah
why do many RNA viruses commonly demostrate antigen drift?
Answer:
:D
Explanation:
How do transitional fossils help explain the evolutionary steps that took place to produce modem organisms?
Answer:
Transitional fossils show how a particular taxa accumulated adaptations to fit particular environments and/or ecological niches
Explanation:
Transitional fossils are fossilized remains of taxonomic groups/species that illustrate an evolutionary transition between a known version of a taxa/species and the current taxa/species. Transitional fossils are fundamental because they can be clearly differentiated from the ancestral group as well as of its derived descendant group. For example, there exist transitional fossils known as "mammal-like reptiles"(i.e., therapsids that gave rise to the true mammals), which are clearly different from current mammals.
The predatory bacterium Bdellovibrio bacteriovorus is able to penetrate a gram-negative bacterium that has a slimy cell covering. What is the correct sequence of structures penetrated by B. bacteriovorus on its way to the prey's cytoplasm
Answer:
The order of bacterial structures that the bacteria would penetrate would be:
Capsule.Lipopolysaccharide MembranepeptidoglycanPhospholipids Membrane.Explanation:
A parasite like B. bacteriovorus faces some challenges in getting into a bacterial cell. This is because these cells have devices and strategies to prevent the entry of parasites and ensure the survival of the bacteria. The first challenge would be to penetrate the bacterial capsule. The capsule is a structure that is located around many bacteria. This structure is rigid, with sharp edges and thick thickness, which protects the bacteria from external agents. If B. bacteriovorus manages to go beyond the capsule, it will find a membrane, also thick, composed mainly of lipopolysaccharides, which will also provide protection and try to prevent the entry of the parasite. If this membrane is crossed, B. bacteriovorus will face another layer called peptidoglycan. This layer establishes itself as a cell wall, being very difficult to break. Some bacteria present one more layer after peptidoglycan, which is a membrane made by Phospholipids, which is highly selective and difficult to break, but is more fragile than the previous layers. Only after overcoming all these structures, the parasite will have access to the bacterial cel
A chain of monosaccharides is called a _________.
A. quasi-saccharide
B. multisaccharide
C. polysaccharide
D. glucose molecule
Answer:
C. polysaccharide
Explanation:
^_^^_^^_^
Comb jellies are:____.
A. Bilaterally symmetrical.
B. Similar to a cnidarian polyp.
C. Distinguished by eight bands of cilia.
D. Colonial animals.
E. Carnivores that use nematocysts to capture prey.
Answer:
C. Distinguished by eight bands of cilia.
Explanation:
Ctenophora, also known as comb jellies, represents a phylum of transparent, mostly pelagic, invertebrate marine animals that live around the world. This group characterized by eight rows of cilia (singular cilium) that are used for locomotion. Cilia are organelles and/or structures that extend from the surface of eukaryotic cells, which can be used to move the surrounding fluid, resulting in cell movement. This phylum is divided into two classes: Tentaculata (with tentacles) and Nuda (without tentacles).
Discuss how the concept of "survival of the fittest" was developed and what it means.
Explanation:
Survival of the fittest is a phrase that originated from Darwinian evolutionary theory as a way of describing the mechanism of natural selection.In On the Origin of Species, he introduced the phrase in the fifth edition published in 1869, intending it to mean "better designed for an immediate, local environment".
Answer:
there right^
Explanation:
edge22
If I lost 17,000 in a year how much did I make that year
Answer:
not a zamn thing
Explanation:
2. Is caffeine really a source of energy
Answer
Yes i believe so
Explanation:
Your considering career options in health field which of the following would focus on performing medical test on animals
Answer: Become a veternarian.
the point when cytoplasm just start diffusion to separate from cellwall is
Answer :
Maybe Plasmolysis...
Chó ăn xương, thế dạ dày của chúng tiêu hoá như thế nào?
Answer:
srd ghvj
Explanation:
2. What is the longest wavelength?
Answer:
red
Explanation:
Visible light may be a tiny part of the electromagnetic spectrum, but there are still many variations of wavelengths. We see these variations as colors. On one end of the spectrum is red light, with the longest wavelength. Blue or violet light has the shortest wavelength.
Answer:
red has the longest wavelength.
Explanation:
blue and violet are the shortest
Can you please help me with this question?
Answer:
B
Explanation:
Plz mark brainliest ;)
Answer:
Option B is the answer
what is photosynthesis .......?
Answer:
the process by which green plants turn carbon dioxide and water into food using energy from sunlight
Answer:
Explanation:
the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.
Osmolarity tells you the concentration of solute particles in solution, osmolarity cannot always tell you the direction of water movement across a membrane.
a. True
b. False
Answer:
a. True
Explanation:
Osmolarity is a measure of solute concentration, that is, it indicates how much solute there is in a liquid. As we know, osmosis is the movement of solute across the cell membrane, where the solute passes from the more concentrated side to the less concentrated side. Osmolarity is directly linked to this concept, but it is not able to indicate the direction of movement of the solute. This is because the solute will only pass through the membrane if it is a penetrating solute. Non-penetrating solutes do not have the ability to move through the membrane, even though the osmolarity of the liquid is high.
describe the effect of temperature on transpiration rate
Answer:
Temperature affects the transpiration rate in two ways. Firstly, at warmer temperatures water molecules move faster, and the rate of evaporation from stomata is therefore much faster. Secondly, the water-holding capacity of warm air is greater than that of cold air.
Explanation:
I hope it helps you
Answer:
Temperature: Transpiration rates go up as the temperature goes up, especially during the growing season, when the air is warmer due to stronger sunlight and warmer air masses. Wind and air movement: Increasing movement of the air around a plant will result in a higher transpiration rate.
g the inability to metabolize phenylalanine is a recessive autosomal trait called PKU when A marries a woman at random from another town what is the probability that his first born will be affected by PKU
Answer:
The correct answer is - zero percent.
Explanation:
As it is known that PKU is a disease that takes place if one has wild type recessive rr only. It is given that A is normal heterozygous and if he marries normal women then
R r
R RR Rr
R RR Rr
so there will be 2 carriers and 2 unaffected but no affected.
A(n) is a molecule, cell, or organ that directly carries out a response to a stimulus and restores homeostasis.
Answer:
Red blood cells and the heart causes response to stimuli
Please help meeee!!
Can you please give me an environmental risk or benefit for artificial selection?
Answer: i answered the first one you posted go check
Explanation:
What is the kind of asexual reproduction
A student constructs a Venn diagram to compare the organelles in plant and animal cells.
Venn Diagram of Plant and Animal Cells
Animal Only
Both
Plant Only
Which organelle should be listed under "Animal Only" in the diagram?
Organelle which is present in only plant cells are chloroplast, centrioles are present only in animal cells. The organelles present in both cells are ribosomes, nuclei, and mitochondria.
What are organelles?The cell parts are called cell organelles. There are both membrane-bound and non-membrane-bound organelles in these cell organelles, which are found within the cells and have distinct structures and functions. The direction and capability productively for the ordinary working of the cell.
Depending on whether or not they have a membrane, the various organelles that are found within the cell are divided into three groups. The types are double membranes, single membranes, and no membrane organelles.
Therefore, organelles perform biochemical functions.
Learn more about organelles, here:
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Excess postexercise oxygen consumption (EPOC) is also known as oxygen debt.
a. True
b. False
Answer:
True.
Explanation:
Excessive postexercise oxygen consumption can also be called oxygen deficit. It occurs after an individual completes a physical activity. Physical effort does not allow oxygen consumption to be normalized as soon as the body comes to rest and for this reason, the body begins to breathe and demand oxygen more intensely. This moment is known as excessive postexercise oxygen consumption, or oxygen debit. The intensity of breathing at this time will depend on the physical effort made, the weight loss and the increase in total caloric expenditure.
What are the processes that are occurring during interphase of the cell cycle.
Answer:
The cell is replicating its organelles and DNA. It's basically growing to prepare for mitosis.
Explanation:
Is it true or false?????
Answer:
Explanation: true
State three different information about zygote.
Answer:
A zygote is the union of the sperm cell and the egg cell . Also known as a fertilized ovum, the zygote begins as a single cell but divides rapidly in the days following fertilization. After this two-week period of cell division, the zygote eventually becomes an embryo.
Explanation:
The growth of the human population directly relates to the use of natural resources by humans. Based on the graph, which two statements about human use if natural resources are most likely true?
A. resources use by humans will be higher in 20 years than it is now
B. resource used by humans is much higher now than it was 200 years ago
C. Resource used by humans in steadily decreasing over time
D. Resource used by humans is about the same now as it was 150 years ago
Answer:
A. resources use by humans will be higher in 20 years than it is now
B. resource used by humans is much higher now than it was 200 years ago
Explanation:
The growth of the human population has direct relation with the use of natural resources by humans means if the population of humans increases, more natural resources will be consumed by the population. Directly relation means if one increases the other automatically and vice versa. more population needs more resources for their growth and survival so we can conclude that resources used by humans will be increases if the population increases.