During a study session about evolution, one of your fellow students remarks, "The giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result." Which statement is most likely to be helpful in correcting this student's misconception?
A. Disuse of an organ may lead to its eventual disappearance.
B. Only favorable adaptations have survival value.
C. If the giraffes did not have to compete with each other, longer necks would not have been passed on to the next generation.
D. Characteristics acquired during an organism's life are generally not passed on through genes.
E. Spontaneous mutations can result in the appearance of new traits.
D. Characteristics acquired during an organism's life are generally not passed on through genes.
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Some crenarchaeotes have growth optima above the boiling point of water (at atmospheric pressure)
Indicate whether the statement is true or false.
The sequence UUUUUUUUU.... was among the first to be analyzed to crack the genetic code because
A) it was the simplest to synthesize. B) it would encode all types of amino acids. C) it would encode only one type of nucleotide. D) it would encode only one type of amino acid.
Which of the following applications seeks to reveal differences in the number of tandem repeats among individuals for
the purposes of identification?
a. genomics b. DNA libraries c. DNA hybridization d. DNA profiling e. DNA probe analysis
. A bell-shaped curve of phenotypic variation is indicative of
a. incomplete dominance. b. continuous variation. c. multiple alleles. d. epistasis. e. environmental variables on phenotypes.