Since all organisms contain DNA (or RNA), how can DNA be used as a trait in studying phylogeny?

What will be an ideal response?


Responses should explain that the presence of DNA is not a distinguishing trait, but rather the sequence of nucleotides is used to differentiate between related species. The similarities in amino acid or nucleotide sequences can be used to group organisms according to their evolutionary histories.

Biology & Microbiology

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Which of these ecosystems has the lowest productivity?

A. tropical forest B. temperate forest C. savanna D. open ocean E. lakes

Biology & Microbiology

What percent of plasma is water?

a. 10 percent b. 27 percent c. 55 percent d. 77 percent e. 92 percent

Biology & Microbiology

There is NO convincing fossil evidence for which of

the following? a. evolution b. extinction c. change d. catastrophism e. uniformitarianism

Biology & Microbiology

Shortly after fertilization, successive cell divisions convert the zygote into a multicellular embryo

during a process known as a. meiosis. b. parthenogenesis. c. embryonic induction. d. cleavage. e. invagination.

Biology & Microbiology