Which scenario would be a modern example of Lamarckianism?
a. A strain of houseflies resistant to insecticides emerges.
b. Squirrels separated by a river are found to be unable to interbreed.
c. A son is born with a portion of his right index finger missing--the same portion that was severed from his
father's hand in an accident.
d. A species of lizards shows changes in diet and body shape after being moved to a nearby island.
e. Snails are found to have thicker shells after the introduction of a predator.
ANSWER: c
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Which of the following is not paired correctly?
A. endoderm: kidneys B. ectoderm: posterior pituitary gland C. mesoderm: circulatory system D. endoderm: liver E. ectoderm: nervous system
Most short-period comets do not have randomly oriented orbits because
a. they are affected by the Sun's gravity. b. they are affected by the solar wind. c. they formed in the Kuiper Belt, a belt-shaped region in the plane of the solar system. d. their orbits are altered by the drag of their tails in the solar wind. e. they all were originally objects ejected from the asteroid belt.
The degeneration of nuclei is occurring in step(s)
a. 4. b. 5. c. 8. d. 4 and 5. e. 4 and 8.
Kidney stones are primarily composed of which substances that settle out of urine?
A. Potassium salts B. Uric acid and calcium C. Urea and potassium D. Phosphates and amino acids E. Fatty acid salts