Before fats can be metabolized in aerobic cellular respiration they must be converted to
A. simple sugars.
B. fatty acids and glycerol.
C. amino acids.
D. fatty acids and amino acids.
B. fatty acids and glycerol.
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Tube feet of sea stars, erectile tissue of the penis in vertebrates, and the bodies of cnidarians are all supported by ____
a. an exoskeleton b. cardiac muscle c. a hydrostatic skeleton d. an endoskeleton e. joined exo- and endoskeletons
Hemoglobin gives up O2 when
a. partial pressure of oxygen is lower than in the blood. b. body temperature is lowered. c. pH values are high. d. CO2 concentrations are low. e. O2 concentrations are high.
Gregor Mendel's work was different from that of other researchers working on inheritance in his day because he alone
A. was a religious man. B. actually counted the numbers and types of offspring. C. worked with pea plants. D. knew how to grow plants.
You may have noticed that many of the cells involved in immunity have more than one function. The T lymphocytes are no exception. Along with killing viruses and bacteria, they also attack eukaryotic cells such as tumor cells or
a. viruses b. prokaryotic invaders. c. eukaryotic parasites. d. worms such as hookworms. e. prions.