What are plasmids? A. Enzymes that bond genetic materials together
B. small rings of bacterial DNA
C. Enzymes that cut DNA
D. Simple organisms with only one chromosomes

When water freezes, it . contracts expands

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.

Sweating and breathing is an example of differentiation specialization maintaining homeostasis metabolism