Q: How many chambers does a mammalian heart have? Choices: - one - five - three - four A:
four

(Question)
Q: What are boggy regions with thick layers of peat called? Choices: - wetlands - tropics - meadows - peatlands A:
(Answer)
peatlands

Ques: Q: What happens when the kidneys cannot remove wastes from the blood? Choices: - tissue failure - intestinal failure - choanocyte failure - kidney failure A:
Ans: kidney failure

(Q).
Q: After fertilization, how many cells does a zygote form into? Choices: - three - one - six - two A:
(A).
two

Ques:Q: In most animals, the circulatory system is used to transport blood through the what? Choices: - fur - stratum corneum - nerves - body A:

Ans:body

Question: Q: What do osteoblasts secrete that mineralizes to become bone matrix? Choices: - spongin - calcium - carbon - collagen A:
Answer:
collagen