Amphibians are not especially successful land-dwellers because of their
A) two-chambered hearts.
B) production of a shelled amniotic egg.
C) lungs that are supplemented by air sacs.
D) reliance on moist skin for gas exchange.
E) choice of prey.
D
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When assigning a scientific name to an organism,
A. the species name is placed first. B. the species name can be abbreviated. C. both genus and species names are capitalized. D. both genus and species names are italicized or underlined. E. the species name is capitalized.
A pollen tube together with its contents of male gametes constitutes the ____
a. male reproductive organ b. endosperm mother cell c. mature male sporophyte d. immature male gametophyte e. mature male gametophyte
Ionized ammonia applied to soil is effectively retained because clays in the soil have a charge that is ________.
A. uncharged B. negative C. positive D. None of these are correct.
In addition to ATP, what are the end products of glycolysis?
A. CO2 and NADH B. CO2 and pyruvate C. H2O, NADH, and citrate D. CO2 and H2O E. NADH and pyruvate