In a population of 271 dd parrots, predators kill 55. what is the approximate fitness of the dd genotype? fitness of dd: 20% fitness of dd: 40% fitness of dd: 60% fitness of dd: 80%

Fitness differ from one genotype to the other. Usually it depends on the survival rate  and reproduction rate of a particular genotpye. As for dd parrots, reproduction rate are equal. thus, fitness is equal to survival rate.

computing for fitness= survivors/ maximum survivors x100
where
survivors = 271-55
                = 216 dd parrots.
fitness= 216 dd parrots/271 dd parrots
fitness = 79.7% round off to 80%
Fitness of dd parrot is 80%.

The equator absorbs the most sunlight

In fact it is not just nuclear fusion and fission that  can  transform  matter  (or mass)into energy. any time  energy  is produced, some small amount of  matter  or mass isconverted into energy.