The hormone indicated by the small oval on the left in the figure could be which of the following?
A. testosterone
B. insulin
C. growth hormone
D. ADH
A
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Approximately what percentage of a cell's genes is being used at any one time?
a. 1 to 2 percent b. 5 to 10 percent c. 25 to 50 percent d. 70 to 80 percent e. 90 to 99 percent
Suppose that the DNA of an organism is studied and found to contain 30% adenine. Based on this information, what percentage of thymine would you predict that the DNA of this organism would also contain?
a. 20% b. 30% c. 40% d. 50%
Birds typically have a large sternum with a bladelike vertical protrusion to which flight muscles attach called:
A. Radius B. Ulna C. Breastbone D. Keel E. Humerus
One of the fish in your aquarium dies. Adding which protist to the water would allow you to avoid flushing the dead fish by speeding its decay?
A) an apicomplexan B) a dinoflagellata C) an oomycete D) a ciliate E) a euglenid