A. It's purpose was to help us learn about the density of Earth's upper atmosphere.
The correct answer is <span>C. A tick attaches itself to the skin of a dog.
A parasitic relationship is one where one organism thrives at the expense of the other. The other organism does not gain but loses.</span>
Our mitochondria DNA come always from the mother (female)
Answer:
D. They both contain carbon, but only nucleic acids contain phosphorous.
Explanation:
