What type of transporters will allow ions to cross the membrane through open or gated channels?
a. Active
b. Recognition
c. Adhesion
d. Passive
e. Receptor
d
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The nitrogenous waste that requires the most energy to produce is _____
A) ammonia B) ammonium C) urea D) uric acid
All types of internal fertilization require
A. specialized anatomical structures. B. physical joining of male and female. C. transfer of a spermatophore to the female reproductive tract. D. a terrestrial environment.
Which of the following statements is FALSE
about cowbirds? a. Their host relationship is similar to cuckoos. b. They are insect-eaters. c. Females can lay thirty eggs in a season. d. Cowbird hatchlings are recognized as imposters by host parents. e. They now parasitize at least fifteen species of native North American birds
In enzyme-catalyzed reactions, substrate is
synonymous with a. end products. b. by-products. c. intermediates. d. reactants. e. co-enzyme.