During which part of the rock cycle does water break rocks apart

This group of organisms perform the process of ammonifcation. a. herbivores b. decomposers c. carnivores c. plants

How do the sperm cells get from the stigma to the ovules? a. they slide down the petals to the bottom of the flower. b. they travel through pollen tubes. c. they travel along filaments. d. insects carry the sperm cells from the stigma to the ovules.

Why are current extinctions of concern to enviromentalists?