Q: Like all tetrapods except birds and mammals, frogs possess a heart with what structure? Choices: - One Chamber - four chambers - eight chambers - three chambers A:
three chambers

Q: What 2 things keep polar bears warm in their arctic ecosystem? Choices: - hibernation, thick fur - colourful fur , blubber - camouflage, blubber - thick fur, blubber A:
thick fur, blubber

Q: Are vesicles larger or smaller than vacuoles? Choices: - larger - narrower - wider - smaller A:
smaller