Answer:
The reproductive system.
Explanation:
Without the reproductive system, humans are not able to reproduce meaning the human species would go extinct. With the reproductive system, humans are able to create more humans, in this way humans do not go extinct.
A chemical bond to form in a chemical compound must be formed by two or more atoms attracted to one another.
Answer;
Mitochondria and chloroplasts contain their own DNA.
Explanation;
-Mitochondria and chloroplasts have striking similarities to bacteria cells. They have their own DNA, which is separate from the DNA found in the nucleus of the cell.
-From the Endosymbiotic theory, even though both organelles are found in eukaryotic cells, both mitochondria and chloroplast have characteristics often found in prokaryotic cells. These prokaryotic cell characteristics include: an enclosed double membrane, circular DNA, and bacteria-like ribosomes.
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