Answer:
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.
Answer:
Explanation:
Vaccinations need a large amount of the population to work effectively. With people not getting vaccinated they are putting the majority of the people at risk of an outbreak of that.
How did stromatolites contribute oxygen to the early atmosphere?
by weathering of rocks
through photolysis
through methane degradation
through photosynthesis
Answer:
by weathering of rocks
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That part of the water cycle is called condensation....
Besides pollution, other threats include overfishing, an excess of phophorus and nitrogen in the water, destruction of habitat, and motorboats. Propellers from the boats can tear out seagrass.
