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

(Question)
Q: Many disciplines within the study of biology contribute to understanding how past and present life evolved over time; these disciplines together contribute to building, updating, and maintaining this? Choices: - amount of life - root of life - forests of life - tree of life A:
(Answer)
tree of life

(Question)
Q: Many diseases arise from genetic mutations that prevent the synthesis of critical what? Choices: - oils - acids - lipids - proteins A:
(Answer)
proteins