Unicellular organisms are devoid of circulatory systems and will be found living in moist or watery environments to facilitate uptake of nutrients and gases and expulsion of waste by the process of diffusion.
Their cell is structured such that it can engage in direct exchange of substances with its environment. Water serves as the perfect medium or environment through which this exchange can occur.
Gases and nutrients simply diffuse into the cell or are moved into the cell by means of active transport or phagocytosis.
The answer is D because if organisms live in a desert biome then these organisms should be used to the hot temperatures, water loss, and strong winds.
Number 2 is A and B number 3 is diagram D has a blue atom in the middle of both reds diagram A does not Number 4 is D and C because they have other colored atoms in the mixture your welcome
“Gaps in the fossil record disprove evolution.” Response: The fact that some transitional fossils are not preserved does not disprove evolution. Evolutionary biologists do not expect that all transitional forms will be found and realize that many species leave no fossils at all.
