MCQ
In Luffa the tendrils are modified
- ✓Extra-axillary branches
- BStipules
- CAxillary branches
- DPetioles
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$R$- Conifers have needle like leaves.

| List $I$ | List $II$ |
| $A.$ Fibrous joints | $I.$ Adjacent vertebrae, limited movement |
| $B.$ Cartilaginous joints | $II.$ Humerus and Pectoral girdle, rotational movement |
| $C.$ Hinge joints | $III.$ Skull, don't allow any movement |
| $D.$ Ball and socket joints | $IV.$ Knee, help in locomotion |
Choose the correct answer from the options given below :
$I.$ a membrane,
$II$ proton pump,
$III$ proton gradient