(Question)
Q: Yolk is a very fragile substance found in the eggs of reptiles and needs protection. what serves as protection for the yolk? Choices: - fish sac - dish sac - eye sac - yolk sac A:
(Answer)
yolk sac

(Question)
Q: What is the term for the movement of substances due to random thermal molecular motion? Choices: - Transfusion - convection - condensation - diffusion A:
(Answer)
diffusion

(Question)
Q: When can mutations occur in genes? Choices: - after rna replication - after dna replication - during rna replication - during dna replication A:
(Answer)
during dna replication