Many species of snakes lay eggs. However, in the forests of northern Minnesota, where growing seasons are short, only live-bearing snake species are present
This trend toward species that have live birth in a particular environment is an example of _____. A) an exaptation
B) sexual selection
C) species selection
D) goal direction in evolution
C
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Which one of the following statements about RNA is correct?
A. RNA is a more stable molecule than DNA. B. RNA has the same 5-carbon sugars as DNA. C. RNA uses the same pyrimidine bases as DNA. D. RNA uses the same purine bases as DNA. E. All of these choices are correct.
As a result of nondisjunction, an individual with Turner syndrome is genotypically XO, lacking one of the sex-determining chromosomes. Taking this into account, the fusion of the gamete containing the extra chromosome with a normal gamete could result in an individual with the genotype
A) XXX. B) XXY. C) XYY. D) A or B E) A, B, or C
Salamanders belong to which of the following lineages?
a. Caudata b. Aves c. Squamata d. Gymnophiona e. Anura
Four of the five answers listed below are cellular. Select the exception
a. viroids b. cyanobacteria c. halophiles d. methanogens e. thermophiles