The red algae are classified as ____
a. rhodophytes
b. chlorophytes
c. phaeophytes
d. bryophytes
e. pterophytes
ANSWER: a
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What is different about the way that NADH and FADH2 donate electrons to the electron transport chain?
A. NADH is oxidized and FADH2 is reduced. B. More protons are transported into the intermembrane space of the mitochondria in response to one molecule of FADH2 as compared to the number of protons transported in response to one molecule of NADH. C. NADH contributes its electrons to the first transmembrane complex in the electron transport chain and FADH2 contributes its electrons after the first transmembrane complex. D. The electrons from NADH ultimately go on to reduce oxygen to generate water, whereas the electrons from FADH2 are used to reduce pyruvate to lactate.
A goose attempts to retrieve an egg that is removed from the nest. This is an example of
A. a fixed action pattern. B. kin selection. C. a sign stimulus. D. imprinting.
Oocytes store mRNAs with _______ and activate them by _______.
a. no cap; addition of a cap b. long poly-A tails; shortening the tails c. short poly-A tails; lengthening the tails d. bound siRNA; removing the siRNA
An insect population grows exponentially until an early winter freeze kills almost all of the insects. The next spring, the population grows exponentially again. This type of population growth is called
A) boom-and-bust cycles. B) sustained cycling. C) density-independent growth. D) S-curve growth. E) density-dependent growth.