Diffusion. It follows the concentration gradient, moving from high to low.
"Sex Cells" or "haploids" are needed in order to add variation in DNA. If there was no "haploids" (which are just cells with 23 Chromosomes), then the female would not need the male for reproduction, basically meaning birth of an identical twin to the mother. The two haploids, the female's ova (Egg) and male's sperm meet, creating a zygote, or a fertilized egg.
This makes sure there is "immediate variation", and it isn't just ten generations of the same "Bob"!
The answer is B
Law of independent assortment is one of the three laws given by Mendel concludes that the traits do not influence other trait which is received from another gene.
The answer would be 9. There are nine <span>essential amino acids needed to create a complete protein. </span>
Adaptation through natural selection