Explain survival mechanisms of bacteria, at the individual and population levels

Can survive in extreme heat, cold, dehydration, and large amounts of ultra violet rays 

Idont know but good luck; )

Plants take energy from the sunlight with the of chlorophyll so the plant starts the food chain. then an herbivore eats the plant and gets its energy.then a carnivore or a human eats the herbivore and gets its energy. : )