Answer:
c. The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA
Explanation:
Mutations are changes in DNA sequence that can create genetic variation within the population. Mutations are important for evolution because of their ability to form a new genetic variant (allele) that can be spread to the offspring. If a new variant of a trait formed by a mutation is advantageous and helps the organism to survive and reproduce, it is going to be favourable by natural selection. That variation will more likely be passed to the next generation and remain over time.
Answer:
it is clearly the oxygen cycle
Answer:
Kicking a soccer ball
Explanation:
1. digesting lunch
2. Blood moving through arteries
3. increasing the heartbeat
4. kicking a soccer ball
The twisted shape of DNA is called Double Helix