The ultimate source of all energy in a
terrestrial ecosystem is
a. the organic matter in all the organisms of
the ecosystem.
b. electrons from water molecules.
c. sunlight.
d. ATP.
e. inorganic mineral ions in the soil
C
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The number of tandem repeats in an individual:
A. will always be homozygous. B. will always be heterozygous. C. will always be equivalent for all family members. D. will vary from chromosome to chromosome. E. None of the answer options is correct.
The final outcome of most host-parasite relationships depends on
A. the host's defenses. B. the number of organisms present in or on the host. C. the virulence of the organism. D. All of the choices are correct.
During parturtition, mechanical pressure
caused by the movement of the fetus through the uterus causes the release of ___ from the ___.
a. HCG---hypothalamus b. oxytocin---posterior pituitary c. oxytocin---hypothalamus d. HCG---posterior pituitary e. oxytocin---adrenal cortex
__________ is the process by which a single-stranded RNA is synthesized using DNA as the template
a. transcription b. reverse transcription c. replication d. transformation e. None of the above