explain how natural selection allows the beetles that are camouflage to flourish in their environment?

Describe how a student should adjust the microscope to see the cells on a slide more clearly?

The bacteria inside a tube worm would be analogous to what organism in the ocean ecosystem near the waters surface? a. photosynthetic algae b. shrimp c. clown fish d. parasitic lamprey

Why do the circulatory systems of land vertebrates have separate circuits to the lungs and to the rest of the body?