<span> the answer is commensalism</span>
1.) A nucleotide of DNA consists of a sugar, a phosphate, and a nitrogen containing base.
2.) A mutation is a change in the base sequence of a DNA molecule
Hope this helps!
"C. Ecosystem"
An ecosystem is described by the interaction between living organisms in a given area, interacting with others, and non-living aspects of the environment where they are in. By considering the living place of a woodchuck, what they eat, and where they feed, we are talking about an ecosystem.
Answer:
Beryllium (Be)
Explanation:
Remember periodic trends...
Period: reactivity decreases as you go from left to right
Group: reactivity increases as you go down the group
