In noncyclic photophosphorylation, O2 is released from
A) CO2.
B) H2O.
C) C6H12O6.
D) sunlight.
E) chlorophyll.
B
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The energy needed to destabilize existing chemical bonds and start a chemical reaction is called
A. activation energy B. free energy C. kinetic energy D. potential energy
Vitamin D is required for ____ absorption
a. sulfur b. phosphorus c. calcium d. potassium e. zinc
In the experimental evaluation of a new drug, what is the purpose of a placebo?
a. A placebo increases the sample size. b. A placebo prevents errors in recording of the data. c. A placebo removes the bias of the physician in charge of the experiment. d. A placebo removes the potential psychological bias of the patient in the study. e. A placebo prevents sampling errors from compromising the results of the experiment
A decomposer is also called a(n) saprotroph
____________________ Indicate whether the statement is true or false.