Which is a requirement for natural selection to occur?
Aheritable variations for some traits
Bthe ability of an organism to improve a trait during its lifetime
Cequal probability of survival for all offspring
Dfewer offspring than the environment can support
Aheritable variations for some traits
Bthe ability of an organism to improve a trait during its lifetime
Cequal probability of survival for all offspring
Dfewer offspring than the environment can support