The Okazaki fragments of the lagging strand of DNA replication are joined together by this enzyme:

In comparative anatomy, structures that are anatomically similar because of descent with modification from a common ancestor are called:

Until the 19th century, all peppered moths (Biston betularia) observed around Manchester, England, were light in color. In 1845, a single black peppered moth was reported. As Manchester became more industrialized, the frequency of black moths increased greatly. The change in proportion of light and dark forms most likely resulted from:

In translation, the _________ of a tRNA molecule will bind to the codon of an mRNA molecule.

Which line of evidence developed since the time of Darwin has strengthened support for his theory of natural selection?

In bacteria, presence of the amino acid tryptophan represses expression of the trp operon because tryptophan binds to the …

Molecular genetics predicts that the longer two species have been evolving separately on their own, the greater the number of ___________ that will accumulate between them.

Mosses and ferns have a reproduction cycle that involves spores. Spores are haploid reproductive cells made by the diploid sporophyte plant. What cell growth process is used to produce plant spores?

Which of the following statements about how genotype determines phenotype is correct?

When a haploid sperm cell fuses with a haploid egg cell, the new cell that is formed is diploid and is called a(n):