The ________ Specifies That Each Entity Instance of the Supertype

question 48

Short Answer

The ________ specifies that each entity instance of the supertype must be a member of some subtype in the relationship.

---

Definitions:

Four-chambered Heart

A type of heart structure found in mammals and birds, consisting of two atria and two ventricles, allowing for efficient separation of oxygenated and deoxygenated blood.

Hemoglobin

Iron-containing respiratory pigment occurring in vertebrate red blood cells and in the blood plasma of some invertebrates.

Oxygen-rich Blood

Blood that has been oxygenated in the lungs and is being transported by the arteries to the rest of the body.

Mammary Glands

Specialized organs in mammals responsible for producing milk to nourish their young.