Conventional wisdom holds that the development of separate species happens quickly, most often when populations become separated by a geographical barrier." this is called speciation. "even if these groups meet again and manage to mate before diverging too far from one another, their offspring will be unfit and die out." this is described as hybrid ) sympatric; viabilityb) allopatric; fertilityc) sympatric; breakdownd) allopatric; breakdown

Which codon is the code for the amino acid histidine (his)?

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.

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above