The subatomic particles that are found in the nucleus of an atom are the
a. protons and electrons.
b. neutrons and protons.
c. electrons only.
d. protons only.
e. electrons and neutrons.
Answer: b. neutrons and protons.
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A stretch receptor is classified as a
a. chemoreceptor. b. mechanoreceptor. c. photoreceptor. d. thermoreceptor. e. all of these.
Which of the following statements is false?
a. Calcium is the most important mineral involved in bone tissue turnover. b. Osteocytes and osteoclasts are involved with the reabsorption and repair of bones. c. Bone mass decreases with age. d. Males have greater problems with loss of bone tissue than females. e. Marrow fills the cavities in the spaces of the spongy bone and in the center of the shaft of long bones.
cAMP levels decrease when __________. This results in __________ of CAP
a. lactose levels increase; activation b. lactose levels decrease; inhibition c. glucose levels increase; inhibition d. glucose levels decrease; activation e. glucose levels decrease; inhibition
Why is common descent considered a scientific theory?
A) There is overwhelming evidence to support it from many areas of biology. B) Scientists are reasonably sure it's true, but there's little evidence to support it. C) It's an idea from more than 100 years ago and thus is not a modern idea. D) It's the only idea about life on Earth that can be tested by observation of the material universe.