Which one of the following quantities best represents the respiratory heat lost by plants in an ecosystem?

A. Gross primary productivity - standing crop biomass
B. Net primary productivity
C. Gross primary productivity
D. Gross primary productivity - secondary productivity
E. Gross primary productivity - net primary productivity


Answer: E

Biology & Microbiology

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Viruses are simple, noncellular, and lack mRNA.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Which method of transport is illustrated here?



a. potocytosis
b. pinocytosis
c. receptor-mediated endocytosis
d. phagocytosis

Biology & Microbiology

Which of the following statements regarding ELISAs is TRUE?

A) They are not quantitative. B) They require large amounts of serum. C) The antibody label is a fluorescent molecule. D) They can be used to detect antibody or antigen. E) They involve the use of membrane filters.

Biology & Microbiology

Glycolysis generates more stored energy than it expends. What is the net number of activated carrier molecules produced in this process (number and type of molecules produced minus the number of those molecules used as input)?

(a) 6 ATP, 2 NADH (b) 4 ATP, 4 NADH (c) 2 ATP, 2 NADH (d) 4 ATP, 2 NADH

Biology & Microbiology