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Bad White [126]
1 year ago
12

The skeleton of the cell, the cytoskeleton is made of what?

Biology
1 answer:
Angelina_Jolie [31]1 year ago
5 0

Answer: A Microtubules

Explanation: The cytoskeleton is composed of at last three different types of fibers: microtubules, microfilaments, and intermediate filaments. These fibers are distinguished by their size with microtubules being the thickest and microfilaments being the thinnest.

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Most living things need oxygen to survive. These two body systems bring oxygen into your body and then move to all your body par
Inga [223]

Answer:

Respiratory system and circulatory system.

The respiratory system allow living things to obtain oxygen from the air while the circulatory system allows oxygen to be carried around the body.

6 0
3 years ago
Wha is 3 things countrys need to do to help global warming
Hoochie [10]

Answer:

The measures which is taken by country need to prevent global warming are given below.

1) The government of the country should planted more trees because plants are only organisms which reduces the concentration of harmful gases which causes global warming.

2) Reduce the use of fossil fuels such as petrol, coal and methane gas.

3) Use solar energy instead of fuel for the production of electricity and other industrial products.

4 0
3 years ago
One of the grand challenges in biology is understanding how the first cells formed on Earth. Since all cells are bound by a cell
coldgirl [10]
<h2>Answer is option "A"</h2>

Explanation:

  • Oils and fats, which in science are called lipids, are known as amphipathic molecules. These molecules have two distinct ends to them: a water-loving (hydrophilic) side and a water-fearing (hydrophobic) side. While the hydrophilic sides of a lipid will associate with the water in a solution, the hydrophobic sides of the lipid all cluster together to 'hide' from the water. Lipids therefore cluster together and form spheres where the hydrophobic sides are in the center away from the water while the hydrophilic sides are on the outside, associating with the water.
  • The ability of the atoms within a group to form hydrogen bonds with the water molecules around them makes them hydrophilic. Oxygen and nitrogen atoms readily form hydrogen bonds with water molecules, so any organic molecules that have oxygen or nitrogen atoms bound to their carbon skeletons will be hydrophilic.
  • For example, if we take the molecule for cholesterol, we see the OH group on the left is hydrophilic and will form hydrogen bonds with water, while the ring structures, which only consist of hydrogen and carbon atoms, are hydrophobic and will not associate with the water.
  • There are many different kinds of lipids with different functions. Lets start by examining phospholipids, which compose the cell membranes of animals. They form lipid bilayers, with one set of hydrophilic heads facing the exterior of the cell membrane and the other set facing the interior (as you can see on the diagram on screen). The hydrophobic portions of the lipid bilayer - the lipid tails - face towards one another, which allows them to hide away from the water inside and outside of the cell.
  • So,the right answer is option A "amphipathic molecules".

5 0
3 years ago
The most common source of activity limitation in early adulthood is
mihalych1998 [28]

Arthritis

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3 0
3 years ago
Energy enters most ecosystems as sunlight. Within an ecosystem, energy is transformed, used, and exits the ecosystem as heat. Dr
postnew [5]
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