<span>The organic chemicals that help
cell membranes to conserve internal fluids are the phospholipids. They are
composed of fatty acid, glycerol, phosphate group and a polar molecule. The phosphate
group and polar head region of the phospholipids is attracted to water while
the fatty acid is repelled by water. They are a major component of the cell
membrane in which it encloses the organelles of the cell. It also limits what
enters and exits the cell because of its two heads.</span>
The answer would be : CO (2 down).
Hope this helps !
Photon
The correct answer is 4) A dichotomous key is complete when each organism stands alone.
The statement about a dichotomous key that is true is "A dichotomous key is complete when each organism stands alone."
Scientists have the need to correctly identify organisms, animals, plants, and objects. For that to happen, they have dichotomous keys.
These tools help them to identify and give a correct name that differentiates from other objects and organisms. So the most important thing about the dichotomous key is the fact that it identifies an organism, species or objects with its scientific name.
Answer:
D. Bryophytes
Explanation:
They are usually the first colonizers. Their root system which aren't true roots, called Rhizoids help attach them to Rocky surface.
