A rhyming couplet, or two-line stanza, is used at the end of a Shakespearean sonnet. A rhyming sestet, or six-line stanza, ends a Petrarchan sonnet.
Viruses use enzymes to destroy host cells after replication is complete.
Scientific names never differ among scientists.
evolutionary relationships
HIV is passed through unprotected sexual intercourse, dirty needles from tattoos, drugs, etc, and transmission of bodily fluids such as through open cuts or wounds. Hepatitis is passed through dirty needles, certain immunocompromised medications for transplants or cancer, and may also be hereditary.
by blood and body fluids
protista
Eukarya
eukaryotic