Which gland produces the hormones oxytocin and antidiuretic hormone (ADH)?
a. pituitary gland
b. pineal gland
c. pancreas
d. hypothalamus
e. ovaries
ANSWER: d
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The first oncogene to be discovered:
A. is a gene that contributes to uncontrolled cell division or cancer. B. was first discovered in a Rous sarcoma virus that causes cancer. C. is a protein kinase that acts as a cell division trigger. D. has a less-active normal counterpart called a proto-oncogene. E. All of these choices are correct.
Which of the following organism is described
by chitin cell walls, spore production, extracellular digestion?
a. water molds b. dinoflagellates c. yeast d. red algae e. ferns
Remember that color is an inherited trait in beetles. Which of the following is an example of natural selection?
A. Green beetles leave more offspring than brown beetles because they are better at finding food. B. Green beetles migrate out of the population. C. Green beetles and brown beetles always leave the same number of offspring. D. A storm kills more green beetles than brown beetles by chance. E. Green beetles migrate out of the population, and brown beetles migrate into the population.
The sudden loss of which organism would necessarily cause the loss of most or all of a food web?
A) producer B) secondary consumer C) mutualistic species D) keystone species