A scientist studies a group of fossilized unicellular organisms that have a contractile vacuole. Which is the most likely purpose of these structures? A. mating B. homeostasis C. grasping prey D. defense from attack

The correct answer is - option B. homeostasis.

Explanation:

The contractile vacuole (CV) is a complex osmoregulatory organelle of free-living microbes or unicellular organisms like amoebae and protozoa, which controls the intracellular water balance by expelling and internalizing overabundance water out of the cell, permitting cells to get by under hypotonic condition as present in lake water. It thought to be important in the regulation homeostasis or hydrostatic equilibrium in these organisms.

Thus, the correct answer is - option B. homeostasis.

c. heat from the poles back down towards the equator.

burning fossil fouls really decrease the carbon in the atmosphere so b