Which of the Labeled Steps in the Diagram Represents Formation

question 34

Multiple Choice

Which of the labeled steps in the diagram represents formation of the primitive heart tube?

• A)A
• B)B
• C)C
• D)D

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Definitions:

Fats

Organic compounds that are made up of glycerol and fatty acids, serving as a major energy source and important for various bodily functions.

Crown

The part of a tooth that is visible above the gum line, or the top part of a plant including the branches and leaves.

Tooth

A hard, calcified structure found in the jaws of many vertebrates, used for biting and chewing food.

Pepsin

An enzyme produced in the stomach that initiates digestion of protein.