Due in a few mins, please help Describe, how melanin protects folate circulating in the blood from UV damage?

When analyzing tree rings, what do scientists assume a thin ring indicates?

Cells destroy body cells infected by a virus or bacteria.

How are gross production and net production different? a. net production is always greater than gross production. b. net production is always less than gross production. only animals have net production. d. only plants have net production. select the best answer from the choices provided