As natural selection increases the frequency of one morphological form over another in the population, what changes at the genotypic level?
What will be an ideal response?
allele frequency
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A cell that is not actively dividing is in what phase of the cell cycle?
A. G1 B. G0 C. G1' D. Gnull
A skeleton that relies on muscular force exerted against water is termed
A. a hydrostatic skeleton. B. an endoskeleton. C. an exoskeleton. D. an ectoskeleton. E. a hygroscopic skeleton.
Which event occurs during the elongation
stage? a. Peptide bonds form. b. Free amino acids bind to the mRNA binding site. c. Anticodons bind to complementary codons. d. A STOP codon enters the ribosome. e. Peptide bonds form, and anticodons bind to complementary codons
You take a sample of bacteria with DNA that contains only 14N and allow them to replicate in a medium that contains only 15N. After 3 rounds of replication, what percent of the DNA molecules will contain one strand with only 14N and one strand with only 15N? Enter your answer as a whole number without the percent sign. For example, 5% would be entered as 5 and 37% would be entered as 37.
Fill in the blank(s) with the appropriate word(s).