B. vertebrates and invertebrates.
Answer:
C.
Explanation:
It is an output directly into the water.
Answer:
cancellation
Explanation:
A factor in the numerator is <em>cancelled by dividing it</em> by the same factor in the denominator. The quotient is 1, the multiplicative identity element.
The polysaccharide is the compound that is unlike wax, saturated fat, and the phospholipid. An example of a polysaccharide is starch.
Explanation:
Complete answer:
A mature erythrocyte lacks nucleus and mitochondria so as to make a place for the accommodation of more hemoglobin and hence more oxygen molecules. Lack of such organelles also provides the peculiar biconcave appearance of RBCs that aids in efficient diffusion. Young mammalian RBCs are nucleated.