When a usable organic electron donor is present, sulfate serves as a terminal electron acceptor during anaerobic respiration by ________.
A. Desulfonema
B. Desulfovibrio
C. Archaeoglobus
D. All of the choices are correct.
Answer: D
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________ aid in the assembly of some biomolecules.
Fill in the blank(s) with the appropriate word(s).
Huntington disease is
A. a model of a multifactorial trait, controlled by several genes. B. inherited as an X-linked dominant trait. C. a disease with onset in early childhood. D. one that produces no significant changes in brain cells. E. a model of a single gene defect affecting behavior.
The trp operon is typically characterized as being both under negative control and repressible
Indicate whether the statement is true or false
One result of natural selection is that populations become better suited to their particular environment by a process called ________
Fill in the blank(s) with correct word