During the third stage of aerobic respiration, electrons and hydrogen ions released by the reactions of the first two
stages are picked up by ____.
a. photosynthetic enzymes and ATP
b. CO2 and H2O
c. iron and glucose
d. NAD+ and FAD
e. O2 and ATP
ANSWER: d
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Which of the following serve as examples of morphological convergence?
a. sharks, penguins, and porpoises b. panthers and tigers c. apes and monkeys d. sharks, skates, and rays e. mice, rats, and gerbils
Which of the following results from the stimulation by nerve impulses generated in the respiratory center when they arrive at the muscles involved in inspiration?
A) contraction of the diaphragm B) reduction in the efficiency of oxygen transport by the blood C) increase in air pressure in the lungs D) opening of the trachea E) downward movement of the ribs
This cellular structure lacks a membrane:
endoplasmic reticulum chloroplast nucleus nucleoid Golgi body
Assume that two genes are 80 map units apart on chromosome II of Drosophila and that a cross is made between a doubly heterozygous female and a homozygous recessive male. What percent recombination would be expected in the offspring of this type of cross?
A) 100 B) 5 C) 30 D) 80 E) 50