When a skateboarder makes
a jump, how is the energy
transformed?
a. the chemical energy in from his food is
transformed into mechanical energy.
b. the thermal energy from his food is
transformed into mechanical energy.
c. the mechanical energy from his food is
transformed into chemical energy.

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.

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

What is a sex-linked genetic disorder that disrupts the blood's ability to clot? a. achondroplasia b. huntington's disease c. hemophilia d. albinism