Scientists know a lot about ancient Earth's climate because of clues that remain in rocks, ice, trees, corals, and fossils. These clues tell us that the
Earth's climate has changed many times over the years. There have been times when most of the planet was covered in ice, and there have also been
much warmer periods. Over at least the last 650,000 years, temperatures and carbon dioxide levels in the atmosphere have increased and decreased in
a cyclical pattern

volcanic: add dust, add carbon...

photosynthesis: removes,permanently

earth orbit: milankovitch, asteroid

Explanation:

Usatestprep

excuse my spelling.

what's the

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus