Please explain why a population may never reach its most fit phenotype
What will be an ideal response?
ANS:
If the adaptive landscapes have multiple peaks, the population will climb the nearest peak even if it is not the highest peak. In the absence of drift, natural selection will keep the population on this local maxima, thereby preventing it from reaching the glob-al maxima.
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Chromatin may be remodeled by: (Select all correct choices)
A. chemical modification of the nucleotide bases of the DNA. B. mutations affecting the structure of the chromosome's non-histone proteins. C. chemical modification of the chromosome's histone proteins.
What is the purpose of accessory pigments, such as carotenoids, in photosynthesis?
What will be an ideal response?
Peptide bonds form between ________
A) amino acids B) an mRNA codon and a tRNA anticodon C) a tRNA and the amino acid it is carrying D) an mRNA transcript and the small ribosomal subunit
When homologous chromosomes are at the equator of the cell, it is in
A. telophase. B. metaphase I. C. metaphase II. D. Any of these stages.