Which species of wheat has six sets of chromosomes
in relation to the original wheat species?
a. A
b. B
c. C
d. D
e. E
Answer: e
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After being filtered blood leaves the glomerular capillaries through the ____
a. renal artery b. renal vein c. afferent arteriole d. efferent arteriole e. peritubular capillaries
Salt is often used to melt ice on roads during the winter because it lowers the freezing/melting point of water. When salt dissolves in water, individual Na+ and Cl- ions break away from the salt lattice and become surrounded by water molecules. Why would this cause ice to melt?
A. Hydrogen bonds are formed, and the salt ions bond with O. As a result, it is more difficult for water molecules to bond and form ice. B. Hydrogen bonds are broken, and the salt ions interfere with interactions between H and O. As a result, it is more difficult for water molecules to bond and form ice. C. Hydrogen bonds are broken, and the salt ions bond with O and H respectively. As a result, it is more difficult for water molecules to bond and form ice.
A stable, long-lasting community is a
A. successional community. B. pioneer community. C. climax community. D. sere.
Compared to a solution of pH 9, a solution of pH 7
A. has no OH- ions. B. is more basic. C. has a higher pH. D. has more H+ ions. E. All of these choices are correct.