Two fossilized remains are found and scientists assume the two organisms are different but related. Which of the following would determine the relatedness of these two organisms?
A. homologous structures
B. vestigial structures
C. biogeography
D. all of the choices could be examined to determine relatedness
Ans: D. all of the choices could be examined to determine relatedness
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Which of the following terms best describes chlamydial genital infection in the United States?
A) arthropodborne disease B) epidemic disease C) pandemic disease D) sporadic disease
All viruses have
a. DNA and protein. b. RNA and protein. c. DNA and either RNA or protein. d. protein and either RNA or DNA. e. RNA and either DNA or protein.
Leeches belong to the phylum
a. Arthropoda. b. Mollusca. c. Annelida. d. Cnidaria.
IP3 binds to ________ receptors.
A. sensor kinase B. phospholipase type-I C. ligand-gated Ca2+ channel D. enzyme-linked E. G-protein coupled