What is the role of the MADS box genes in plants?
A) The MADS box inhibits compound leaf formation.
B) The MADS box acts as a transcription factor that regulates flower formation.
C) The MADS box genes allow for hypocotyl elongation.
D) The MADS box genes control the organization of cell polarity in the apical meristem.
E) The MADS box genes control the timing of germination.
Answer: B
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Anoxygenic photosynthetic bacteria
A. obtain electrons from water. B. do not produce oxygen as a by-product. C. may obtain electrons from H2S. D. are obligate aerobes. E. do not produce oxygen as a by-product AND may obtain electrons from H2S.
To which of the following groups does the organism
in the above figure belong? a. diplomonads, parabasalids, trypanosomes, and euglenoids b. ciliates, dinoflagellates, and apicomplexans c. water molds, diatoms, and brown algae d. chlorophyte and charophyte algae e. none of the above
What sequences or structures within the DNA can be used to identify sites of transposition?
A) target site duplication and direct repeats B) target site duplication and short tandem repeats C) inverted loops D) target site inversion and direct repeats E) chromosome translocation and insertion of transposase gene
In flowering plants, what is the relationship between the sporophyte and gametophyte?
A) The gametophyte is dominant, and the sporophyte is microscopic. B) The sporophyte and gametophyte are independent of each other. C) Flowering plants do not produce gametophytes. D) Flowering plants do not produce sporophytes. E) The sporophyte is dominant, and the gametophyte is retained on the sporophyte.