If the inner membrane of the mitochondria were compromised in some way, what effect would this have on cellular
respiration?
a. The transport of electrons across the inner mitochondrial membrane would not occur.
b. The proton gradient across the inner mitochondrial membrane would dissipate.
c. The ATP synthase enzyme would relocate to the mitochondrial matrix.
d. The cell would generate more ATP.
e. ATP would no longer be made anywhere in the cell by any mechanism.
ANSWER: b
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Parental care in dinosaurs, crocodiles, and birds is an example of
A. homoplasy caused by convergence. B. homoplasy caused by common descent. C. homoplasy caused by evolutionary reversal. D. homology caused by convergence. E. homology caused by common descent.
The normal functions of Spo11 and Cas9 enzymes are different because
A) Spo11 produces double-strand breaks during meiosis, whereas Cas9 functions during mitosis. B) Spo11 produces site-specific double-strand breaks during meiosis, whereas Cas9 breaks DNA at random genomic locations. C) Spo11 produces double-strand breaks in many genomic locations during meiosis, whereas Cas9 is targeted to specific sequences by a CRISPR RNA. D) Spo11 produces double-strand breaks at sequences targeted by RNAs expressed during meiosis, whereas Cas9 has the ability to recognize DNA sequences without an RNA. E) Spo11 is unique to yeast, whereas Cas9 occurs in most higher eukaryotes.
What was the dependent variable in the peacock butterfly experiments?
a. changing predators b. changing habitats c. painting the wings d. clipping the hindwings e. getting eaten
Hummingbirds are small birds that require a regular food supply
When hummingbirds are faced with a situation that decreases their food supply, such as a storm, which of the following adaptations would be most useful for the bird to survive such an unpredictable and short-term absence of food resources? A) shivering B) torpor C) hibernation D) burrowing into soil