In autumn, people pile fallen leaves and put them in a compost pile. after several weeks, the pile becomes warm. where does the heat come from?

 The heat comes from the bacteria consuming readily decompose materials and the oxidation process heats up the compost pile from ambient air temperature. Bacteria consume carbon as a source of energy (to keep on eating) and nitrogen to build protein in their bodies (so they can grow and reproduce).

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