For evolution to become the theory that underpins all of the biological sciences, which of the following
had to occur?
a. Darwin had to write The Origin.
b. Lamarck's theory of biological evolution had to be disproved.
c. Darwin had to prove that finches in the Galápagos were descended from a common
ancestor.
d. Mendel had to discover genes.
e. Research in many fields had to provide evidence for evolution.
E
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Once glucose has entered a cell, what prevents it from diffusing back out of the cell?
a. Glucose pumps actively transported any leaked glucose back into the cell. b. One side of the cell membrane is permeable to glucose, but the other side is not. c. Glucose inhibitors attach to glucose once it’s in the cell. d. Glucose is phosphorylated, preventing it from leaving the cell. e. Glucose is hydrolyzed into two three-carbon molecules that cannot diffuse in a reverse direction.
Beginning with an atom and working up to the entire planet, biologists view life as arranged from ________
A) small and simple to large and complex B) small and complex to large and simple C) large and complex to large and simple D) large and complex to small and simple
Approximately what proportion of the radiant energy entering an ecosystem is used in photosynthesis?
a. 1% b. 4% c. 10% d. 50% e. 75%
Sperm-carrying fluid from the human male is
A. called semen. B. released on a twenty-eight-day cycle (approximately). C. stored in the urinary bladder. D. described by two of these answers.