The nonsulfur photosynthetic bacteria use organic compounds as
A) carbon sources.
B) electron donors to reduce CO2.
C) energy sources.
D) electron acceptors.
E) oxygen sources.
B
Biology & Microbiology
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Molecular evidence indicates that the division between humans and African apes took place
Biology & Microbiology
The covalent linkage between nucleotides is referred to as a(n) ____ bond
Some help with this? Thank you.
Biology & Microbiology
Clams, oysters, and scallops are called bivalves because they have
a. a pair of eyes. b. bilateral symmetry. c. a double foot region. d. a shell made up of two halves. e. two sexes.
Biology & Microbiology
Which structure stores nitrogenous waste removed from a bird embryo?
1.amniotic cavity
2.allantois
3.chorion
4.yolk