A zoologist observes a fixed aquatic animal with no tissue differentiation but efficient water filtration. Which of the following is most likely to happen if this animal was placed in a terrestrial environment?
It would desiccate due to inability to retain water
A fixed (sessile) aquatic animal with no tissue differentiation but efficient water filtration matches the description of a sponge (Phylum Porifera). Sponges have no true tissues and rely on the surrounding water to bring in food and oxygen and to carry away wastes; their whole body plan is built around water flow through pores.
If such an animal were placed on land, it could not maintain this water flow and would lose water from its body surface very quickly. It has no organs to conserve water, no tentacles, no ability to move to moist areas and no controllable pore closure. It would simply dry out (desiccate) and die because it cannot retain water outside its aquatic environment.
Hence, the answer is It would desiccate due to inability to retain water.
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