Be a Lunatic What are the moon's craters caused by?
volcanic eruptions
collisions with asteroids
collisions with Earth
collisions with ultraviolet radiation

What stage(s) of cellular respiration make atp?

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.

Which example describes a mutualistic relationship between organisms? young wasps prey on caterpillars. crabs eat the remains of dead fish. tapeworms feed on food in the intestines of cats ants protect a tree on which they feed.