Nitrifying Archaea such as Nitrosopumilus maritimus use ________ as a sole carbon source and are capable of obtaining sufficient energy by aerobically oxidizing ________
A) CO2 / NO
B) sugars / NH3
C) CO2 / NH3
D) organic acids / NO
Answer: C
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What statement is most likely true about nest decorating behaviors in starlings? a. It will decrease the amount of predation on the fledglings
b. It will always harm the fledglings. c. It has no impact on the fledglings. d. It decreases the amount of competition for nesting sites. e. It may be adaptive for a variety of reasons.
Before the genes of a zygote become active, the stages of animal development are directed by
a. the environment. b. the cytoplasmic determinants of the egg. c. the cytoplasmic determinants of the sperm. d. the cytoplasmic determinants of the egg and the sperm. e. the nucleus.
The STD that will always produce symptoms is ________
A) gonorrhea B) chlamydia C) syphilis D) HPV infection
Internal fungal infections are very common in healthy individuals.
a. true b. false