Which of the following features is shared by all animals?
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) contact between their cells and an aqueous medium

Question

Quizplus · Accepted Answer

All animals have cells that must exchange nutrients and waste with their environment, necessitating contact between their cells and an aqueous (water-based) medium. This is a fundamental requirement for animal life, unlike the other options which are not shared by all animals.

Which of the Following Features Is Shared by All Animals