Ques: Q: In the freshwater flatworms, protonephridia serve chiefly in what? Read this paragraph and choose the correct option from the provided answers: Choices: - enculturation - excretion - thermoregulation - osmoregulation A:
Ans: osmoregulation

Ques: Q: What do the hair cells in the cochlea release when they bend? Read this paragraph and choose the correct option from the provided answers: The oval window passes the vibrations to the cochlea . The cochlea is filled with liquid that moves when the vibrations pass through, like the waves in water when you drop a pebble into a pond. Tiny hair cells line the cochlea and bend when the liquid moves. When the hair cells bend, they release neurotransmitters. 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? Read this paragraph and choose the correct option from the provided answers: When a series of straight waves strike an impenetrable barrier, the waves stop at the barrier. However, the last particle of the medium at the back corner of the barrier will create circular waves from that point, called the point source. This can be seen in the image below. This phenomenon is called diffraction , and it occurs in liquid, sound, and light waves. While the waves become circular waves at the point source, they continue as straight waves where the barrier does not interfere with the waves. Choices: - refraction - sonic wave - reflection - diffraction A:
Ans: diffraction

Ques: Q: When do homologous chromosomes separate and go to different gametes? Read this paragraph and choose the correct option from the provided answers: During meiosis, homologous chromosomes separate and go to different gametes. Thus, the two alleles for each gene also go to different gametes. At the same time, different chromosomes assort independently. As a result, alleles for different genes assort independently as well. In these ways, alleles are shuffled and recombined in each parent's gametes. Choices: - during electrolysis - before meiosis - after meiosis - during meiosis A:
Ans:
during meiosis