In areas where fires are often suppressed, what can be said of the seeds that do not germinate
for many years until stimulated by fire?
a. The seeds remain dormant.
b. The seeds hibernate.
c. The seeds are disturbed.
d. The seeds are opportunistic.
A
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The mRNA that would most likely have the longest half-life would:
A. containan exon junction complex bound downstream of a stop codon. B. lack a stop codon. C. containan AU-rich element in the 3'-UTR. D. containone or more hairpin structures.
In heterotrimeric G proteins, the ________ subunit stimulates adenylyl kinase.
Fill in the blank(s) with the appropriate word(s).
A gene that determines the heaviness of a man's beard is
A) X-linked. B) sex-limited. C) sex-influenced. D) Y-linked.
Global climate change is likely to increase the rate of extinction worldwide. What pollutant is most implicated in this problem?
A) nitrous oxides B) carbon dioxide C) sulfur dioxides D) chlorofluorocarbons