In an open system such as a campfire, matter can <span>lose particles, gain particles or exchange particles.</span>
Answer:
There's not enough information to answer this. You need to provide the information on the people.
Answer:
I would say B. digestive system.
Explanation:
The digestive system breaks down food and processes it into energy molecules that the body of an organism can use.
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DNA structure. DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C).
