For flowers, which of the following is NOT a
possible combination?
a. complete and perfect
b. complete and imperfect
c. incomplete and perfect
d. incomplete and imperfect
e. more than one of these is NOT a possible
combination
B
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The binding of a neurotransmitter to ligand-gated Na+ channels will cause ____ in the postsynaptic membrane
a. depolarization only b. hyperpolarization c. repolarization only d. apolarization e. depolarization and repolarization
The lowest level of biological organization that can survive and reproduce is the ____
a. proton b. DNA c. nucleus d. tissue e. cell
What is the ?G for the inward transport of sucrose?
For a particular cell at 25°C, the concentration of sucrose is 10 mM on the inside of the cell and 0.5 mM on the outside, whereas the concentration of sodium ions (Na+) is 0.5 mM on the inside of the cell and 10 mM on the outside. The membrane potential is -150 mV. Constants: R = 1.987 cal/mol-K; T = 25°C = 298 K; F = 23,062 cal/mole-volt A) +1.774 kcal/mol; an endergonic reaction B) +1.774 kcal/mol; an exergonic reaction C) ?1.774 kcal/mol; an endergonic reaction D) ?1.774 kcal/mol; an exergonic reaction E) None of the above are correct.
Adults who have children who have died from lethal recessive disorders are most likely
____________________. Fill in the blank(s) with the appropriate word(s).