__________ selection favors intermediate forms of a trait where __________ selection favors extreme forms. Fill in the blank(s) with the appropriate word(s)
ANSWER: Stabilizing; disruptive
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Amino acids are linked together by peptide bonds in a ____
A. starch. B. polypeptide. C. polysaccharide. D. nucleic acid. E. phospholipid.
A researcher obtains a sequence of a gene of interest including the ORF, 5? untranslated region, and 3? untranslated
region. Which portion of the gene sequence encodes the protein?
a. the 5? untranslated region and the ORF only b. the ORF only c. the ORF and 3? untranslated region only d. the 5? and 3? untranslated regions only e. the ORF, 5? untranslated region, and 3? untranslated region
Which is a correct statement about reptile reproduction compared to bird reproduction?
A. The eggs of both birds and reptiles have protective shells. B. Birds are oviparous, reptiles are ovoviviparous. C. Male or female reptiles reproduce asexually; birds do not. D. Both exhibit external fertilization. E. Both newly hatched birds and reptiles require parental care.
The time stretching from the emergence of Homo erectus until the dawn of human agriculture is called:
A. Holocene B. Pliocene C. Oligocene D. Pleistocene E. None of these.