About 25 million years ago, the anthropoids that remained in Africa gave rise to two lineages, the Old World monkeys and the
A. New World monkeys.
B. apes.
C. first primate.
D. hominoids.
Answer: D
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Nucleotides are joined together to make a nucleic acid strand by ____ bonds
a. phosphodiester
b. disulfide c. glycosidic d. hydrogen e. peptide
In the Hershey-Chase experiment, what was labeled by growing bacteriophage in 32P-containing medium?
A) ghost phage particles B) proteins C) lipids D) DNA E) RNA
Why scientist randomly sample the population of study?
A. to minimize the deviation from the population. B. to make sure that all the samples are different. C. to easy confirm the null hypotheses. D. to make sure that all samples are similar.
All humans alive today have inherited their mitochondrial DNA from some individual female common ancestor. Studies indicate this woman probably lived about ________ years ago, when fossil evidence indicates that Homo sapiens was restricted to ________
A) 20,000; Africa B) 50,000; Africa and Asia C) 180,000; Africa D) 500,000; Africa, Asia, and Europe