What is the biological species concept put forth by Ernst Mayr in 1942?
What will be an ideal response?
Species are populations, or groups of populations, within and among which individuals actually or potentially interbreed and outside of which they do not interbreed.
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Based on the following classification scheme, which two organisms are most closely phylogenetically related? Why?
What will be an ideal response?
Which of the following statements is correct?
A. All fungi, whether parasite or saprobe, are heterotrophs. B. All saprobes are heterotrophic, but only some are parasitic. C. All heterotrophs are parasites, but only some are saprobes. D. All heterotrophs are fungi, and include both parasites and saprobes.
Which of the following plants both parasitizes other plants and performs photosynthesis?
a. snow plant b. lady-of-the-night orchid c. mistletoe d. cobra lily e. dodder
Suppose that Joe Scientist fuses a mouse cell and a human cell, and then treats the cell with specific antibodies covalently linked to fluorescent dyes (antibodies linked to mouse proteins are green; antibodies linked to human proteins are red). Forty minutes later, Joe Scientist looks at the fused cell. What will Joe Scientist observe?
a. The red and green labels will be distributed in intermingled patches. b. The red and green fluorescent labels will be uniformly distributed across the entire membrane. c. The red and green labels will flash intermittently. d. The cell will be half red and half green.