Scientist determine that abundance of apple aphids on leaves of 120 apple trees. the autumn leaf color of the apple tree varied.

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.

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.

Why did adult crab numbers decline in he ecosystem, even though sea stars were still available?