Answer:
Explanation: The basic unit of a DNA is a Nucleotide. The nucleotide comprises of: the nitrogenous bases, a deoxyribose sugar and a phosphate group. The nitrogenous bases are the purines and pyrimidines . The include, Adenine, guanine, Thymine and cytosine
Ammonia (NH3) is inorganic and would be the answer to your question
The cells of the CNS are called neurons. They secrete neurotransmitters.
Answer:
common ancestor
Explanation:
If it is a cladogram or phylogenic tree which is what it sounds like your describing, the connection is that all organisms share a common ancestor :)
