Which of the following is one way that beach erosion can occur?
1.currents increasing the sand on the beach with additional sand from the ocean
2.storm waves bringing sand to the beach from the ocean
3.storm waves pulling sand from the beach out into the ocean
4.currents replacing sand on the beach with sand from the ocean

What is the number of phosphates in an atp molecule

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.