Which of the following descriptions best fits the class of molecules known as nucleotides?
A) a nitrogenous base and a phosphate group
B) a nitrogenous base and a sugar
C) a nitrogenous base, a phosphate group, and a sugar
D) a sugar and a purine or pyrimidine
C
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The net gain of ATP per molecule of glucose metabolized anaerobically via the Embden-Meyerhof pathway in prokaryotes is
A. 85. B. 38. C. 36. D. 2.
Which of the following statements regarding evolutionary relationships among land plants is correct? (Select all correct answer options.)
A. The ancestor of all land plants was a green alga. B. Bryophytes and vascular plants together form a monophyletic group. C. Vascular plants diverged more recently than bryophytes. D. Bryophytes form a monophyletic group. E. Vascular plants evolved from mosses.
Why are skin grafts between identical twins more successful than grafts between more unrelated individuals?
a. Identical twins share the same uterine environment. b. Identical twins are exactly matched in age c. Identical twins have identical HLA alleles. d. Identical twins are always the same sex. e. Identical twins have the same blood type.
What can we learn about evolution of the vertebrates by examination of embryos?
What will be an ideal response?