Answer:
They are concerned because that is natural water. Water, for ALL organisms is needed to live, so we also have to keep it safe for us and there life to live.
Explanation:
hope this helps
Answer:
A
Explanation:
Dna is built with a phosphorous backbone
I know that in identical twins, their genetics are much more alike :)
Answer:
Homologous chromosomes exchange DNA with one another.
Explanation:
During crossing over, the two Homologous chromosomes line up next to eachother and the DNA "crosses over" changing the genes on the chromosome.
