Which is not considered a disadvantage of having an exoskeleton?
a. Exoskeletons can get relatively heavy
b. Molting is needed to grow.
c. Unique construction of the joints for appendages.
d. It diminishes the ability to maintain buoyancy.
c
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The number of ATP molecules generated per atom of oxygen that is reduced when electrons are passed from NADH or reduced FAD (FADH) to O2 is called the
A. P/O ratio. B. phosphorylation coefficient. C. utilization ratio. D. energy yield.
Ribosomes are made up of
A. DNA and RNA. B. only protein molecules. C. protein and RNA. D. only DNA molecules. E. only RNA molecules.
In vertebrates, the dorsal nerve cord evolved into a brain and spinal cord, which together constitute which of the following?
A. Central nervous system B. Brain C. Cephalization D. Peripheral nervous system E. Autonomous nervous system
A. In which scientific unit is the strength of a chemical bond usually expressed?
B. If 0.5 kilocalories of energy are required to break 6 × 1023 bonds of a particular type, what is the strength of this bond?