There are 4 thing that need to happen for natural selection to occur:
1) reproduction
2)heredity
3)variation in fitness or organisms
4)variation in individual characters of the population.
Hopes this helps:
Answer:
The body of a fish is streamlined because, it increase the speed of the fish in the water. The more the streamlined shapes more easier for the fish to swim in the water.
Down syndrome, turner syndrome, Klinefelter syndrome, and fragile X syndrome.
Ohhh I know this! Number 1 is saturated fats, Number 2 is unsaturated
Answer:
The answer is option A which is Amino acids
