There are ________ classes of levers
a. two
b. three
c. four
d. more than four
a
You might also like to view...
Which of the following reactions is the least likely to occur spontaneously?
A. A + B -> C if ?G° for the reaction equals -2.5 kcal/mol. B. A + B -> C if ?G° for the reaction equals -12.5 kcal/mol. C. A + B -> C if Keq for the reaction equals 0.5. D. A + B -> C if Keq for the reaction equals 1.5. E. A + B -> C if ?G° for the reaction equals +1 kcal/mol.
The majority of human infections with Campylobacter species are caused by:
a. direct contact with carriers of the bacte-rium. b. contamination of food, milk, or water with animal feces. c. multiplication of the organism in food products. d. direct contact with persons infected with the bacterium.
Molecules that permeate a plasma membrane by facilitated diffusion
A) do so much more quickly than those crossing by simple diffusion. B) require the aid of transport proteins. C) require energy. D) move from an area of low concentration to an area of high concentration.
Kin selection refers to
A) the selection of a mate. B) deciding which related animals can live in the colony. C) deciding which related animals can share the food. D) determining which related animals must live and which must die. E) an animal promoting the survival of the genes of its close relatives.