Answer: A. virus strains multiplied in cell cultures
<span>C. metric ruler since millimeters are metric</span>
A.) An allele is a version of a gene that can be expressed as a phenotype.
Because almost all small streams end up in bigger bodies of water.
Answer:
Explanation:
A retrovirus is an RNA virus that is duplicated in a host cell using the reverse transcriptase enzyme to produce DNA from its RNA genome. The DNA is then incorporated into the host’s genome by an integrase enzyme. The virus thereafter replicates as part of the host cell’s DNA. Retroviruses are enveloped viruses that belong to the viral family Retroviridae. A special variant of retroviruses are endogenous retroviruses, which are integrated into the genome of the host and inherited across generations. Endogenous retroviruses are a type of transposon.
