Male tortoiseshell cats ________
A) do not have an X chromosome
B) have orange and black patches of fur that reflect the pattern of X chromosome inactivation
C) are usually XYY individuals
D) are likely to be exceedingly rare and very likely to be sterile since normal male cats are XY
D
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When gibberellin binds to its receptor, what happens to activate the gibberellin-dependent transcription factor GA-TRXN?
A. Ethylene is released. B. A ubiquitin tag is used to degrade the GA-TRXN inhibitor. C. A DELLA protein is degraded, freeing the GA-TRXN. D. A DELLA protein is attached to GA-TRXN to activate it. E. The gibberellin is transferred to an alternate binding site.
Fungal ____ live within leaves or other plant tissues, appearing to form a mutually beneficial symbiotic association
a. haustoria b. endophytes c. ectophytes d. mycorrhizae e. mycobionts
Chile's Atacama Desert is used as a model and testing ground for exploration of Mars because ________
a. the ozone layer is functionally absent in both places b. both environments may support bacterial life under the surface of the soil c. temperatures in both environments are quite similar d. neither environment is believed to support life
A 45× objective and a 10× ocular produce a total magnification of
A. 145×. B. 900×. C. 450×. D. 55×.