Answer:
A
Explanation:
Because the more species that live their can determine how well the environment is doing.And that their is enough resources for them to survive.
<span>After a long time, a mature community is established and this community does not change unless it is disturbed.</span>
Answer:
The instructions for making proteins are coded in the (cytoplasm / <u>DNA</u> / endoplasmic reticulum / nucleus) of a cell. In a eukaryotic cell, these instructions are located in the (cytoplasm / DNA / endoplasmic reticulum / <u>nucleus</u>).
Explanation:
The genetic code is contained in DNA, or deoxyribonucleic acid. This is usually the same among most organisms, save some RNA viruses. But in eukaryotes, the DNA is in the nucleus, whereas in prokaryotes the DNA is in the "nucleoid region", or a twisted up section near the middle of the cell.
In the 50s the model of the atom looked like a planet, with the electrons circling the nucleus. Now we know the elections are shared by many nucleuses so that the model was actually very misleading.
