The answer that you are looking for is:
B) invasive species
I just took the test. Hope that helps!
Specialised cells , nerve cells , blood cells
Answer:
Each base pair is formed from two complementary nucleotides (purine with pyrimidine) bound together by hydrogen bonds. The base pairs in DNA are adenine with thymine and cytosine with guanine.
Explanation:
There are 200 different cells in a human body and within those cells there are about 20 different types of structures or organelles .
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