What is characteristic of adult frogs?
a. gills
b. sucking air into their lungs
c. countercurrent exchange
d. pushing air into their lungs
e. drawing water by inhalation across their gills
ANSWER: d
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You observe two female fish of the same species breeding. One female lays 100 eggs and the other female lays 1000 eggs. Which one of the following is LEAST likely given the limits of fitness trade-offs?
A) The female laying 100 eggs breeds more often than the female laying 1000 eggs. B) The female laying 100 eggs lives longer than the female laying 1000 eggs. C) The eggs from the female laying 1000 eggs have larger yolks than the yolks of the eggs from the female laying 100 eggs. D) The female laying 1000 eggs is larger than the female laying 100 eggs.
Which vertebrates exhibits a "flow through" respiratory system?
A. mammals B. birds C. amphibians D. fishes E. birds and fishes
According to the first law of thermodynamics,
A) chemical reactions are exothermic. B) entropy tends to increase. C) potential energy tends to degrade into an unavailable form. D) energy is neither created nor destroyed.
The chemolithotrophs that metabolize reduced sulfur compounds using oxygen as a terminal electron acceptor in the Winogradsky column include ________.
A. Beggiatoa B. cyanobacteria C. Chromatium D. Desulfovibrio