Forests serve to
a. hold water.
b. control soil erosion.
c. control flooding.
d. control sediment buildup in lakes, rivers and reservoirs.
e. all of these.
E
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The blastopore develops into the ________ in protostomes and the _______ in deuterostomes.
a. mouth, anus b. mouth, urethra c. anus, mouth d. anus, nose
Assuming the standard values for the atmospheric
partial pressures of N2, O2, and CO2 at sea level, what is the approximate total partial pressure of the remaining atmospheric gases? a. 0.3 mm Hg b. 3.3 mm Hg c. 5.3 mm Hg d. 7.3 mm Hg e. none of these
Which of the following species of Homo did NOT live contemporaneously with H. sapiens?
A. H. neanderthalensis D. H. habilis B. H. floresiensis E. All of these species of Homo did live contemporaneously with H. sapiens. C. H. erectus
Benzer's analysis of phage genomes included deletion mapping
Since recombination could not occur in the area of a deletion, an infection by two phage strains, one of which has a deletion and the other a point mutation, that results in no wild-type recombinants being produced indicates ________. A) that the deletion includes the position of the point mutation in the same gene B) that the deletion includes the position of the point mutation in a different gene C) that the point mutation is dominant D) that the point mutation is recessive E) the distance between the two types of mutation