Meiosis. Sexual recombination. Crossing over. Independent assortment. Mutations.
The two MAIN sources would be genetic(sexual) recombination and mutations. Mutations allow for genetic variation, while genetic recombination allows for genetic shuffling. :)
Answer:
D
Explanation:
Not sure but the sentence is super understamdable
Frogs are cold blooded and most camouflaged frogs are nocturnal
