They are similar in three main ways
1.Both DNA and proteins are polymers.
2. Both are made from smaller subunits joined together. DNA is made of subunits called nucleotides joined together and protein is made up subunits called amino acids joined together.
3. In both of them, these subunits or monomers are linked together by covalent bonds.
Nucleotides are a combination of a nitrogen - rich base that is either adenine, guanine, cytosine or thymine, together with a phosphate group and a sugar.
Answer:
<em>The correct option is C) C-shaped cartilage rings </em>
Explanation:
The trachea is commonly known as the wind-pipe. The trachea can be described as about a 4 inch long passage from which the air travels into the bronchi and lungs. The pathway of the trachea is kept open by C- shaped cartilages which are lined all over in the trachea. The C-shaped cartilages protects as well as maintain the shape of the wind-pipe. The rigidity of the trachea arises from the C-shaped cartilages.
Contraction of muscles called peristalisis
Metabolic rate and production of by products of the ice fish increases with temperature
