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frosja888 [35]
3 years ago
10

Microtubules are typically _______ in diameter.

Biology
1 answer:
jeyben [28]3 years ago
4 0

Answer:

25nm

Explanation:

Microtubules are polymers of tubulin and they are part of the cytoskeleton. The roles of the microtubules are to maintain the shape and structure of the cell, intracellular transport, they are structural part of the cilia an flagella, they are involved in cell division etc.

Tubulin that is the basic unit of microtubules is composed of two globular proteins, alpha and beta tubulin. Alpha and beta subunits sponta­neously form dimers which then assemble into oligomers, then in chains (protofilaments); that can form a variety of intermediate structures such as single and double rings or spirals. Protofilaments that associate side-by-side  form sheets of protofilaments which then curle to form a tube or cylinder (closing of microtubule). Continued growth of microtubules occurs by the di­rect addition of more dimers on + side.

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The muscular system helps with ____ and the skeletal system helps with ____. Question 1 options: movement; oxygen exchange movem
Anna007 [38]

Answer:

The correct answer is movement; structure.

The muscular system helps with <u>movement</u> and the skeletal system helps with <u>structure</u>.

Explanation:

The human muscular system constitutes 40% of the total weight of our body and is made up of three types of muscles, which, together with different tendons and thanks to their contraction capacities, allow us to move. The muscular system and the function of the muscles allow the movement of our body and it is the one that works in tune with other systems of our body to guarantee normal general functioning..The skeletal system is the set of organs that support, shape, structure and protect the body. The skeleton is a dynamic structure, specifically the axial skeleton, it is to serve as a support or as a scaffold that supports the organs and structures of the body. This is how bones together with muscles work as a team to allow the mobility of the human body.

5 0
3 years ago
Tommy and teagan are learning the process of good home gardening and decide to help their parents as best as they can. every day
Orlov [11]
According to a source, the answer to this question is by compacting the soil, decreasing aeration and infiltration. With this process in mind, the plant would be able to survive.

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3 0
2 years ago
Plz help i have attachment file
quester [9]

I believe that it is D. All of the above.

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6 0
2 years ago
What 3 types of larvae begin as plankton?
Svetllana [295]

Answer:

sponges, crabs, sea stars, snails, worms, and fishes.

Explanation:

The animal groups with larvae in the plankton include, sponges, crabs, sea stars, snails, worms, and fishes. These tiny larvae are not the only ones out there floating around in the plankton.

4 0
2 years ago
Read 2 more answers
What is another name for the phospholipid bilayer?
4vir4ik [10]
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It's called like that because it is made out of lipids and it also has phosphate groups, while the bilayer part means it just has two layers. Therefore it is commonly also called a lipid membrane. 

6 0
3 years ago
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