Primitive feathers in certain dinosaurs evolved in anticipation of flight in their descendants, the birds
Indicate whether the statement is true or false.
ANS: F, as adaptations for other factors
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Which of the following techniques describes either the rate of a molecule's migration or its final position in a gel?
A) hybridization B) electrophoretic mobility C) densitometry D) restriction fragment analysis E) peptide fingerprint analysis
Four of the five answers listed below are sinks for sugar deposition. Select the exception
a. immature fruits b. roots c. leaves d. immature seeds e. shoots
Some dogs have erect ears; others have drooping ears. Some dogs bark when following scent; others
are silent. Erect ears and barking are due to dominant alleles located on different chromosomes. If two dihybrids are crossed, a. the most common phenotype is drooping ears and barking. b. all droopy-eared, silent dogs are pure-breeding. c. the least common phenotype is drooping ears and barking. d. there will be no phenotypes or genotypes that resemble the original parents. e. there will be no offspring that resemble the F1 generation.
A purine or pyrimidine that differs in chemical structure from a purine or pyrimidine normally found
in DNA or RNA is called a _____________. Fill in the blank(s) with the appropriate word(s).