Drosophila biologists often diagnose species by crossing individuals from different populations. Implicit in this method is the:

a. evolutionary species concept. c. phylogenetic species concept.
b. phenetic species concept. d. biological species concept.


D

Biology & Microbiology

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SRY is

A) a single-region Y gene. B) a Y-inactivation center gene. C) the sex-determining region of the Y chromosome. D) a Y-controlling element. E) None of these

Biology & Microbiology

Which of the following are sugar-transporting cells in angiosperms?

a) parenchyma cells b) tracheids and vessel elements c) sieve-tube elements d) collenchyma cells e) clerenchyma cells

Biology & Microbiology

To make a vaccine against mumps, measles, or rabies, which type of viruses would be useful?

A) dsDNA viruses B) negative-sense ssRNA viruses C) positive-sense ssRNA viruses D) dsRNA viruses

Biology & Microbiology

Warts are caused by

A) papillomavirus. B) poxvirus. C) herpesvirus. D) parvovirus. E) Staphylococcus aureus.

Biology & Microbiology