There are two main reasons. First, there are introns and exons existed in eukaryotes. Introns do not contain the genetic information but are in large amount in chromosome. So, if the mutation occurs in the introns, it will be recessive. Second, one amino acid will corresponding to several base sequences. For example, UUU and UUC all represent Phe. This is called degeneracy. So if the mutation did not change the amino acid, it is also recessive.
Answer:
Epithelial cells are tightly packed, and this lets them act as barriers to the movement of fluids and potentially harmful microbes. Often, the cells are joined by specialized junctions that hold them tightly together to reduce leaks.
Explanation:
The Jolly Time popcorn, I believe.
The primary functions of the liver are:
Bile production and excretion.
Excretion of bilirubin, cholesterol, hormones, and drugs.
Metabolism of fats, proteins, and carbohydrates.
Enzyme activation.
Storage of glycogen, vitamins, and minerals.
Synthesis of plasma proteins, such as albumin, and clotting factors.
