Ques: Q: In the freshwater flatworms, protonephridia serve chiefly in what? Choices: - enculturation - excretion - thermoregulation - osmoregulation A:
Ans: osmoregulation

Ques: Q: What do the hair cells in the cochlea release when they bend? Choices: - receptors - hormones - lipids - neurotransmitters A:
Ans: neurotransmitters

Ques: Q: What is the phenomenon in which light and sound waves become circular at the point source of a barrier? Choices: - refraction - sonic wave - reflection - diffraction A:
Ans: diffraction

Ques: Q: When do homologous chromosomes separate and go to different gametes? Choices: - during electrolysis - before meiosis - after meiosis - during meiosis A:
Ans:
during meiosis