Thorn of Citrus and Bougainvillea is modified:

1. Stem              

2. Root               

3. Leaf                

4. Inflorescence

Offset is one internode-long runner and its each node bears rosette of leaves and a tuft of roots. It is found in aquatic plants like:

1. Hydrilla           

2. Pistia              

3. Eichhornia      

4. Both (2) and (3)

Leaves are modified into tendrils in:

(1) Parkinsonia     

(2) Pea                 

(3) Ranunculus     

(4) Oxalis

When a shoot tip transforms into a flower,

1. It is always solitary

2. The flower is always short-lived

3. It is never solitary

4. The flower is always long-lived

Stem tendrils are not seen in:

1. Grapevine

2. Watermelon

3. Citrus

4. Cucumber

Which of the following is not a stem modification?

1. Thorns of citrus

2. Tendrils of cucumber

3. Flattened structures of Opunita

4. Pitcher of Nepenthes

A lateral branch with short internodes and each node bearing a rosette of leaves and a tuft of roots is found in:

1. Chrysanthemum

2. Pistia

3. Jasmine

4. Pineapple

A lateral branch with short internodes and each node bearing a rosette of leaves and a tuft of roots is found in:

1. Chrysanthemum

2. Pistia

3. Jasmine

4. Pineapple

Modified aerial stem with the branching of unlimited growth as the photosynthetic structure is

1. Flattened in Opuntia and Euphorbia

2. Fleshy and cylindrical in Euphorbia

3. Cylindrical in Opuntia

4. Cylindrical in Euphorbia and Opuntia

Thorn is

1.  Modification leaf

2.  Axillary bud modified

3.  Climbing structure

4.  Always non-woody