Which formula can be used to determine the number of categories (phenotypes) possible in the F2 results of a polygenic system?
What will be an ideal response?
2n + 1 (where n is the number of gene pairs)
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A phospholipid is a _____
A) nonpolar lipid molecule that is made polar by the addition of a phosphate B) nonpolar lipid molecule that is made amphipathic by the addition of a phosphate C) polar lipid molecule that fully interacts with water D) polar lipid molecule that fully repels water
The nonselective movement of water and a number of solutes into excretory system tubules is called --____
a. reabsorption b. excretion c. filtration d. secretion e. diffusion
The current rate of extinctions is about ____
times faster than normal.
a. 10 b. 100 c. 1000 d. 100, 000 e. 1, 000, 000
Which structure is part of the brain stem?
A. thyroid B. hypothalamus C. adrenal cortex D. Medulla Oblongata