Populations are held in check by
a. resource partition.
b. predation.
c. social parasitism.
d. competition.
e. all of these
E
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Answer the question using the accompanying figure. Identify the developmental brain region that gives rise to the
a. hindbrain b. midbrain c. telencephalon d. medulla e. forebrain
When the atria of the heart are full of blood, the ____ valves are closed
a. atrioventricular b. aortic c. pulmonary d. pulmonary and aortic e. atrioventricular and aortic
A halophile would ________ in a high salt environment.
A. undergo plasmolysis B. become crenated C. form endospores D. thrive E. undergo osmotic lysis
A scientist is studying the HOTAIR ncRNA in human cells growing in culture. She identifies a mutation in a cell line that she suspects may affect the function of HOTAIR. The mutation changes the sequence in region 2 from 5?-CUCCCUU-3? to 5?-CUGGACG-3? (see diagram). How will this mutation affect the function of HOTAIR?
A. The mutant HOTAIR will bind to different target genes than the normal HOTAIR, but it will not inhibit their expression. B. The mutant HOTAIR will bind to the same target genes as the normal HOTAIR, but it will not inhibit their expression. C. The mutant HOTAIR will bind to different target genes than the normal HOTAIR, and it will inhibit their expression. D. The mutant HOTAIR will not be produced. E. There will be no difference in the function of the mutant and normal HOTAIR ncRNAs.