DNA and RNA both contain a cyclic nitrogenous base, a posphate group and a five-carbon sugar. These are the base units of nucleotides which make up nucleic acids. DNA contains the nitrogenous bases; adenine, thymine, cytosine and guanine wheresas RNA contains the bases; adenine, thymine, cytosine and urasil. DNA codes for the nucleotides in an RNA molecule, whereas DNA codes for the amino acid sequence in a protein
Answer:
1. Buccal cavity (oral cavity) and the nasal passage opens into Pharynx. Pharynx opens into esophagus of the digestive system and opens into larynx of the respiratory system.
2. It is an organ which is found in both vertebrates and non-vertebrates. However, the structure may vary from species to species.
3. The word “Pharynx” is derived from the Greek words “Pharunx” or “Pharung”. Its plural form is pharynges.
Explanation:
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