1.The ................. of an adult sea star, a type of echinoderm, is on the upper surface of the animal. When a sea star is resting on the sea floor, its ...................aces the sea floor. 2.Technically, short-day plants flower when the _______ period _______ a critical period

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A: Answer

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A: Answer is d.)  mollusks.

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A: 1 blank- Gap genes 2 blank- homeodomain

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Evolutionary adaptations

Evolutionary adaptation is the process through which organisms adapt or adjust to their surroundings to increase the chances of survival, mating, and reproduction. An organism's behavior, physiology, and structure are adjusted or changed to make it more suited to its environment.