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.

True or false: (a) the strings of little red dots represent carbohydrates. (b) the model is called a bilayer because there are two main types of molecules present, lipids and proteins. (c) the many black lines represent amino acid tails. (d) this model shows membrane transport. (e) the blue ovals are hydrophobic. (f) the blue ovals represent phospholipid heads.