All animals, whether large or small, have ________.
A) an external body surface that is dry
B) a basic body plan that resembles a two-layered sac
C) a body surface covered with hair to keep them warm
D) most of their cells in contact with an aqueous medium

Question

Quizplus · Accepted Answer

Most animals, whether large or small, have most of their cells in contact with an aqueous medium. This is because cells require water to carry out their metabolic processes. Option A is incorrect because not all animals have an external body surface that is dry. Option B is incorrect because although some animals have a basic body plan that resembles a two-layered sac (e.g., cnidarians), this is not true for all animals. Option C is incorrect because not all animals have a body surface covered with hair to keep them warm.

All Animals, Whether Large or Small, Have ________