The two interesting types of people who led researchers to discovery of the SRY gene were
A) physicists and chemists.
B) XX males and XY females.
C) XY males and XX females.
D) XXX females and XYY males.
B) XX males and XY females.
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Which part of the lac operon is cis-dominant?
What will be an ideal response?
The taller a Brazil nut tree is, _____
1. the more valuable it is as a source of lumber 2. the less useful it is to harpy eagles 3. the greater its photosynthetic rate relative to neighboring plants A) 1 only B) 1 and 2 C) 1 and 3 D) 2 and 3
The best definition of osmotic pressure is
A) The movement of solute molecules from a higher to a lower concentration. B) The force with which a solvent moves across a semipermeable membrane from a higher to a lower concentration. C) The movement of a substance across a semipermeable membrane from a higher to a lower concentration. D) The active transport of a substance out of a cell to maintain equilibrium. E) The movement of solute molecules from a lower to a higher concentration across a semipermeable membrane.
When a leg vein is grafted to provide an alternate route around a point of obstruction between the aorta and a clogged coronary artery, the procedure is called ________
A) coronary infarction B) coronary bypass C) a stent D) angioplasty