In the embryo of a shark, ectoderm gives rise to __________; mesoderm gives rise to __________; endoderm gives rise to __________.

• A. muscle; the outer covering of the animal; the central nervous system
• B. the lining of the digestive tract; muscle; the outer covering of the animal
• C. the central nervous system; the outer covering of the animal; the lining of the digestive tube
• D. muscle; the outer covering of the animal; the lining of the digestive tube
• E. the central nervous system; muscle; the lining of the digestive tube

Answer: (E)

Verified step by step guidance

1. Understand the three primary germ layers in embryonic development: ectoderm, mesoderm, and endoderm.
2. The ectoderm is the outermost layer and typically gives rise to structures such as the central nervous system and the outer covering of the animal.
3. The mesoderm is the middle layer and is responsible for forming structures like muscles, bones, and the circulatory system.
4. The endoderm is the innermost layer and develops into the lining of the digestive tract and other internal organs.
5. Match the given options with the functions of each germ layer: ectoderm (central nervous system), mesoderm (muscle), and endoderm (lining of the digestive tube).