Biotic factors are the living things in any environment, while abiotic factors are the nonliving things.
So, in the Sahara desert the living things (biotic factors) would be the animals and plants.
The nonliving things (abiotic factors) would be the sunlight, temperature, dirt, etc.
Answer: Examples of beneficial mutations are HIV resistance, lactose tolerance, and trichromatic vision.
A series of cell divisions that result in the formation of an embryo is called mitosis.