When a diploid cell divides by mitosis, the result is __________
A) identical haploid cells
B) identical diploid cells
C) unique diploid cells
D) unique haploid cells
E) a zygote.
B
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A student argued that aerobic and anaerobic respiration should produce the same amount of energy
He argued that both processes are essentially the same-only the terminal electron acceptor is different. What's wrong with his argument? A. Nothing-they SHOULD both produce the same amount of energy. Clearly he knows more than his professors or the writers of his textbook. B. Not all electrons are brought into the electron transport chain with the same amounts of potential energy. NADH, for example, enters the electron transport chain "further up" than FADH2-so it will lead to less proton motive force being generated, and thus less eventual ATP. C. Not all electron acceptors are the same-some are closer in terms of electronegativity to their high-energy electron carrier molecules (e.g., NADH) than others. The amount of energy that can eventually be obtained is directly proportional to the degree of difference in electronegativity between the high-energy electron carrier and the eventual terminal electron acceptor. The greater the difference, the greater the energy obtained. Oxygen typically has the highest electron affinity of the terminal electron acceptors utilized. D. He should believe what his instructors tell him, without question-and they say aerobic respiration is better, so it MUST be so.
Which of the following is a characteristic of mitochondria?
a. being unable to survive outside the cell b. using energy to make glucose c. being involved in photosynthesis d. having linear-shaped chromosomes
Most of the absorption of nutrients (besides water) takes place in the ________.
A. stomach B. small intestine C. esophagus D. large intestine
In this figure, the genotype of the resistant parental bollworms is ___ while the susceptible parental bollworms have a ___ genotype. Select one:
a. RR; Rr b. Rr; rr c. RR; rr d. Rr; RR e. rr; RR