Oxygen is an electronic which can be defined as pure substance..we breath in oxygen and breath out carbon dioxide
<span>Cartilage. Cartilage primarily tissue consists of chondrocytes, specialized cells that form a matrix of collagen and other proteins. Cartilage tissue is found at joints between long bones, and also comprises other structural areas in the body such as vertebrae, bronchial tubes, the outer ear, the nose, and in between ribs.</span>
C4 plants are more efficient photosynthesizers than c3 plants due to lower rate of photorespiration.
