Answer:E. Adenine and Guanine
Explanation:
They are double <u>double carbon- nitrogen rings with four nitrogen atoms</u> bases found in DNA and RNA. Purines always pair with pyrimidines(cytosine and thymine) to form a double helix structure.This precise paring ensured that the DNA has a complementary structure.
This paring of purines with pyrimidines is by hydrogen bonds. This is to ensure easily unwinding during replication, that is formation of new DNA molecules.
purines bases are also used for cell protein synthesis fro cell division.
Your answer is B, without phosphorus the plant would not be able to grow.
Answer:
Streptococcal or Staphylococcal bacteria
Explanation:
They attach themselves to the inner lining of the heart making it to becme inflamed and casing damage to the heart valves.
Answer:
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It should be C or D (probably D) since you're measuring the height of the entire container with water
