RIB CAGE

TRUE/FALSE TYPE QUESTIONS: A bird is sitting on the floor of a wire cage and the cage is in the hand of a boy. The bird starts flying in the cage. The boy will not experience any change in the weight of the cage.

Read the following statements regarding Rib cage and its components, a-Formed by ribs, sternum and thoracic vertebrae, b- Ribs articulate with sternum on dorsal side and thoracic vertebrae on ventral side. c- Vertebral ribs articulate with thoracic vertebrae only. d- First 8 pairs of ribs directly articulate with sternum. Choose the option which includes only incorrect statements

Assertion : Ribs are thin, flat and curved bones that form a protective cage around some internal organs of the body. Reason : All the 24 ribs are attached to the backbone at the back and to the breastbone in the front.

Assertion : Both true ribs and floating ribs are present in mammals Reason : By nature, stenal ribs are true ribs as, they possess all the characters of ribs.

Ribs

Assertion: First seven pairs of ribs are called true ribs. Reason: These ribs are not connected ventrally to the sternum.

Bird : Cage : : ?

m distinct animals of a circus have to be placed in m cages, one in cach cage. If n (< m) cages are too small to accommodate p (n < p < m) animals, then the number of ways of putting the animals into cages are