Ferroplasma acidarmanus is ________.
A. capable of growth at pH 0
B. lacks a cell wall
C. capable of oxidizing iron
D. All of the choices are correct.
Answer: D
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Which of the following would bear the most resemblance to Archaeopteris, an ancient plant genus that preceded gymnosperms and angiosperms?
A. A ginkgo lacking vascular tissue. B. A pine tree that does not produce cones. C. A cycad that does not produce coralloid roots. D. A grass species that lacks flowers. E. A sunflower that does not produce endosperm.
Which best explains how Australia has distinctive organisms, such as marsupials, that cannot be found anywhere else
on Earth? a. Australia has an unusual climate that has triggered natural selection. b. There are fewer species of organisms in Australia than most continents. c. Australia experienced a significantly slower rate of evolutionary change. d. The predators of marsupials eliminated the populations in other locations. e. Australia was separated and isolated from other land masses for a long period of time.
Evolution occurs
A. When a mutation occurs B. Over generations C. At birth of an organism D. During one lifetime E. All answers are correct
What is the role of DNA molecule in the synthesis of proteins?
a. they catalyze the formation of bonds between amino acids. b. they determine the sequence of amino acids in a protein c. they transfer amino acids from the cytoplasm to the nucleus d. they supply energy for protein synthesis