According to the fossil record, five took place, which lowered the variety of species found on earth today.

Which of the following occurs after a natural or unnatural disturbance in an ecosystem

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

In what for do plants utilize nitrogen? why do they need nitrogen?