Q: Frogs and toads, salamanders and newts, and caecilians are the three orders of what group of animals? Choices: - marsupials - reptiles - mammals - amphibians A:
amphibians

Q: What characteristic of the endothelium structure minimizes resistance to the flow of blood? Choices: - uneven surface - liquid surface - transition surface - smooth surface A:
smooth surface

Q: Having extra chromosomes or damaged chromosomes can cause what? Choices: - deformities - problems - diseases - disorders A:
disorders