because they have many population and many other countries visited the singapore because of the environment, beautiful place and etc..
Answer:
the answer is three
Explanation:
i took the test and it is correct
I think it’s B,C,A sorry if it’s wrong
Answer:
Mutations, gene flow, and sexual reproduction are all major causes of variation. By altering the genes of individuals in a population, DNA mutation causes genetic variation. As new individuals with different gene combinations migrate into a population, they cause genetic variation.
Explanation:
B)