While students are studying a rock outcrop along a highway, they discover a sedimentary rock layer that contains fish fossils. what best explains why these fossils are there? a: the local area was once an aquatic environment b: long ago these fish also lived on land. c: someone once dumped some dead fish there. d: a flood washed these fossils to this area.

Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.

Where in the cell are ribosomes made?

Tropical rain forests support more species per unit area than any other terrestrial ecosystem. what is one way rain forests are important to the health of the biosphere?