What is the function of the iris in the eye of a frog?
- ARefraction of light rays
- BRegulating the size of the pupil
- CMoving the nictitating membrane
- DMoving the lens forward and backward
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The bone of mammals contains Haversian canals which are connected by transverse canals known as
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View SolutionIdentify the parts $A$ and $B$ from the given diagram.
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View SolutionWhich one of the following pairs of structures is correctly matched with their description?
Description Structures $a$. Tibia and fibula Both form parts of knee joint $b$. Cartilage and cornea No blood supply but do require oxygen for respiratory need $c$. Shoulder joint and elbow joint Ball and socket type of joint $d$. Premolars and molars $20$ in all and $3$ rooted
| Description | Structures |
| $a$. Tibia and fibula | Both form parts of knee joint |
| $b$. Cartilage and cornea | No blood supply but do require oxygen for respiratory need |
| $c$. Shoulder joint and elbow joint | Ball and socket type of joint |
| $d$. Premolars and molars | $20$ in all and $3$ rooted |
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View SolutionThe receptors found in the muscles,tendons,and joints are:
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View SolutionThe teeth of a rabbit are . . . . . . .
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