Evidence suggesting that snakes evolved from ancestral lizards includes the fact that _____
a. some give live birth to their young
b. some have bony remnants of hind limbs
c. all have internal fertilization
d. all have amniotic eggs
e. some actually have legs
ANSWER: b
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Dietary glucose is transported into a cell against its concentration gradient with the aid of membrane proteins called Na+/glucose_____.
a) aquaporins b) channel proteins c) receptor proteins d) symporters e) antiporters
Which kingdom or supergroup is characterized by organisms that are saprotrophic by absorption?
A. Fungi B. Animal C. Protists D. Plant
Bacteria that produce nitrite ( NO2? ) during anaerobic respiration would use ________ as their final electron acceptor.
A. N2 B. N2O C. O2 D. NO3?
An explanation of observations and data supported by the experimental results of many scientists for many years is
A. a theory. B. a hypothesis. C. scientific method. D. popular opinion. E. a control group.