The overall structure is said to be a double helix composed of nitrogenous bases and the sugar backbone. It is also double stranded too
Mutation is the only evolutionary mechanism that does little to change allele frequencies.
The answer is B. By polluting near by streams with pesticides and herbicides
It looks correct to me. Good job
Answer:
Volcanic degassing of volatiles, including water vapour, occurred during the early stages of crustal formation and gave rise to the atmosphere. When the surface of Earth had cooled to below 100 °C (212 °F), the hot water vapour in the atmosphere would have condensed to form the early oceans.
Explanation:
