(Q).
Q: Tissue is made up of layers of tightly packed cells that line the surfaces of the body, such as skin. Choices: - weak tissue - neural tissue - resultant tissue - epithelial tissue A:
(A).
epithelial tissue

(Q).
Q: A yolk sac replaces what structure for nourishing a marsupial embryo? Choices: - uterus - glucose - Stomach - placenta A:
(A).
placenta

(Q).
Q: An environment in which cells neither sink nor swell is known as what? Choices: - pressured environment - electrolyte environment - exothermic environment - isotonic environment A:
(A).
isotonic environment