What statements about the embryos are true? Check all that apply.

A. All four animals begin as fertilized eggs.

B. The salamander and the chicken do not have an umbilical cord.

C. Only the fish has ancestral gill slits.

D. All four have identical limb buds.

E. Only the chicken will develop a shell breaker.

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.

is it multiple choice?