Astudent drew this model of the trophic levels of an ecosystem. how can you improve this model’s accuracy?
a. the sun should be added at the bottom, with 100 percent of the energy.
b. the energy retained should decrease from the bottom of the pyramid to the top.
c. the energy retained should be equal from the bottom of the pyramid to the top.
d. the sun should be added at the top, with 100 percent of the energy.
an epidemic is the general term for an infectious disease that has spread across a city, region, or country.
extinct organisms; that is, they belong to species that are no longer living anywhere on earth. (3) the kinds of fossils found in rocks of different ages differ because life on earth has changed through time.
plants have a distinct, multicellular haploid phase