Climate change is usually negative because if it dramatic it could kill most of species.
A cell is the smallest basic unit of life
I'm assuming you meant and frailness not fertility, in which case it is the oldest old period
No, because the colder the temperature is, the less water that can exist in an area. The cold air you feel is dry air, therefore humidity most likely won't exist in freezing temperatures. Have a beuatiful day
Nonvirulent bacteria can still be transformed into virulent bacteria if it is combined with debris from heat-killed virulent bacteria that is first treated with RNase, protease, or no enzyme because these are important factors for the establishment of virulence and are often required when bacteria modify their genetic record in response to the conflicting or adverse situations.