After looking at the experiment in the figure above, what can be said about productivity in marine ecosystems?
A) Nothing can be said based on this information.
B) Marine organisms break down iron for energy and thus for productivity.
C) Iron can be a limiting nutrient in productivity.
D) Productivity increases when chlorophyll a is added.
Answer: C
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In a population of 2400 long horn sheep, 400 males and 750 females breed each season. What percentage of the actual population is the effective population size?
A. ~48% B. ~43% C. ~27% D. ~65% E. ~17%
A mature mRNA contains which of the following?
A. Exons B. 5' Cap C. 3' Poly-A-tail D. introns E. All of the above F. A, B, C, D G. A, B, C, H. B, C, D
Taq polymerase is a DNA polymerase enzyme that demonstrates maximal activity at 72oC. The organism from which this enzyme was isolated would most likely be classified as a:
psychrotroph psychrophile mesophile thermophile hyperthermophile
For children 3 years of age and older, the most useful growth charts are
Select one: a. BMI-for-age. b. head circumference and height-for-age. c. weight-for-height and head circumference. d. weight-for-age and height-for-age.