Q: Sharks are an example of an animal with sharp vision that is nonetheless unable to distinguish what? Choices: - depth - shapes - contrast - color A:
color

Q: What type of behavioral rhythms are linked to the yearly cycle of seasons? Choices: - annual - biannual - monthly - circannual A:
circannual

Q: Convex lenses are thicker in the middle than at the edges so they cause rays of light to converge, or meet, at a point called what? Choices: - the center - the base - the apex - focus A:
focus