What percentage of the atmosphere is nitrogen gas?
a. 20%
b. 40%
c. 60%
d. 80%
e. 90%
ANSWER: d
You might also like to view...
Which of the following is an example of gene regulation at the posttranslational level?
A. Initiation of protein synthesis B. Alteration of protein structure C. Prevention of RNA synthesis D. Early termination of an mRNA transcript
What is a zero-growth isocline?
A) when the population size of species 1 exceeds species 2 B) the set of values where ? = ? C) the set of values of two population sizes where the growth rate is 0 D) the set of values where the carrying capacity is reached for one of the two species
Many scientists believe that the evolution of multigene families, such as the genes for hemoglobin, is a result of which type of genetic rearrangement?
A) Duplication B) Deletion C) Inversion D) Reciprocal translocation E) Nonreciprocal translocation
Agar, widely used in microbiology growth media, is obtained from
A. Protozoa. B. Mold. C. Bacteria. D. Algae.