Which of the following reproduce by parthenogenesis?
A. bees
B. some lizards
C. some fish
D. some frogs
E. All of the choices are correct.
Answer: E
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The reaction: pyruvate + CoA + NAD+ ? acetyl CoA + CO2 + NADH, is catalyzed by pyruvate dehydrogenase. If an inhibitor of this enzyme was added to cells, then ___ levels in the cytoplasm would increase.
A. NADH B. Pyruvate C. Acetyl CoA D. CO2
__________ refers to nutrient enrichment of any ecosystem that is otherwise low in nutrients. Fill in the blank(s) with the appropriate word(s)
The microbes commonly known as ________ are single-celled eukaryotes that are generally motile
A) archaea B) bacteria C) fungi D) protozoa E) viruses
Heterotrophic bacteria will run out of organic growth substrates in batch cultures but chemostats can provide constant nutrient source for them to grow
Chemostats for photoautotrophic bacteria are not necessary to maintain them at a constant growth phase because a light can artificially be turned on constantly. Indicate whether the statement is true or false.