All the atoms of the same element will have the same:
A) mass. B) number of neutrons.
C) number of protons and neutrons. D) number of protons.
Answer: D
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A parent cell of a certain organism has 16 chromosomes and undergoes meiosis. The resulting cells will have how many chromosomes?
a. 64 b. 32 c. 16 d. 8 e. 4
Which of the following assumptions is made by scientists who apply the concept of maximum parsimony?
a. Assume that the most obvious and simple way is correct. b. Assume that unexpected relationships are caused by mutations. c. Assume that most trait changes are typically undetectable. d. Assume that evolutionary modifications are branchpoints.
The structure designated by the letter "A" in
the above figure is called a. pyloric sphincter. b. esophagus. c. mucosa. d. duodenum. e. none of these.
Which one of the following is the most primitive vascular plant?
A. fern B. angiosperm C. gymnosperm D. moss