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which of the following describes the relationship between the villi and the plicae circulares?

a. the plicae circulares are folds in the mucosa that are lined with villi.
b. the plicae circulares are folds in the submucosa that are lined with villi.
c. the villi are folds in the mucosa that are lined with plicae circulars.
d. the villi are folds in the submucosa that are lined with plicae circulars.

Which u. s. state is home to the fewest species of mosquitoes?

Viruses use the host's machinery to make copies of themselves. however, some human viruses require a type of replication that humans do not normally have. for example, humans normally do not have the ability to convert rna into dna. how can these types of viruses infect humans, when human cells cannot perform a particular role that the virus requires? a) the virus causes mutations in the human cells, resulting in the formation of new enzymes that are capable of performing these roles. b) the viral genome codes for specialized enzymes not in the host. c) the virus infects only those cells and species that can perform all the replication roles necessary. d) viruses can stay in a quiescent state until the host cell evolves this ability.

Which food preservation method can people use at home? a. fermentation b. irradiation c. pasteurization d. thermal processing