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Agata [3.3K]
3 years ago
14

Describe the main three polysaccharides and their functions

Biology
1 answer:
Yuki888 [10]3 years ago
3 0

Answer:

starch is the surplus unit for the glucose made in photosynthesis

cellulose is found in plant walls

then glycogen is the surplus unit used by animals to store glucose

Explanation:

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I think either A or B
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4 years ago
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Identify the cellular structures and it’s functions
Eva8 [605]

The cellular structures include cell nucleus, nuclear pores, genetic material (DNA), cytoplasm, nuclear lamina, cell membrane, mitochondria, cytoskeleton and lysosome. It is an animal cell.

<h3>Cellular structures and organelles </h3>

The cellular structures observed in the Figure include cell nucleus (A), nuclear pores (B), genetic material (C), cytoplasm (D), nuclear lamina (E), cell membrane (F), mitochondria (G), cytoskeleton (E) and lysosome (F).

The cell nucleus is an organelle that contains the genetic material (DNA) in eukaryotic cells.

The nuclear pores are little pores in the nuclear membrane that allow the passage of small molecules (e.g., RNAs, transcription factors) by simple diffusion.

The genetic material (DNA) contains the instruction to synthesize all cellular components.

The cytoplasm is an aqueous solution inside the cell, which is mainly composed of dissolved proteins and salts.

The nuclear lamina is a rigid structure located inside the cell nucleus which serves to provide structural support to this organelle.

The cell membrane is a semipermeable lipid bilayer that allows the passage of certain substances in and out of the cell.

The mitochondria are the energetic factories of eukaryotic cells, which act to generate ATP by a process called cellular respiration.

The cytoskeleton is an interconnected network of protein filaments that provides structural support to the cell.

The lysosome is an organelle inside animal cells that contains hydrolytic enzymes used to degrade different substances.

Learn more about cellular components here:

brainly.com/question/6350862

8 0
3 years ago
Astrocytes create the blood–brain barrier to protect the brain. True or False
son4ous [18]

Answer:

False

Explanation:

The blood brain barrier (BBB) is a selective border that prevents the entry of foreign substances into the brain. It is made up of different components including endothelial cells, astrocytes, and pericytes etc.

Of all these mentioned three, the endothelial cells are directly responsible for the selectivity of the BBB. The endothelial cells are bound together by the tight junctions situated between them, impeding the passage of foreign materials e.g. solutes, pathogens etc.

Astrocytes help to maintain the BBB by surrounding the endothelial cells, providing biochemical strength.

The pericytes are located in the basement membrane, where they communicate with endothelial cells. They help to sustain the BBB by stabilizing and monitoring the maturation of endothelial cells via communicating directly between cell membrane as well as paracrine signalling.

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3 years ago
Ecosystems recover from disturbance through ecological succession. T F
Viefleur [7K]
True is correct answer.
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3 years ago
Explain E.O. Wilson's theory of Island Biogeography as it applies to environments other than islands physically
fgiga [73]

Answer:

The theory of E.O. Wilson's theory of Island Biogeography was originally developed as island biogeography, to explain species richness of actual islands, surrounded by water.

It proposes that the number of species found in an undisturbed environment is determined by immigration and emigration. According to him, the species richness will be the same if this island will have an equal number of the immigration and extinction or emigration of species.

3 0
4 years ago
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