Find out the wrongly matched pair :-

1. Tuber - Potato 

2. Leaf buds - Banana

3. Bulbil - Agave

4. offset - Water hyacinth

Thorns of Bougainvillea are the modification of

Sweet potato is a modified

1. Rhizoid

2. Stem

3. Adventitious Root

4. Leaf

Underground modification of stem occurs for following special functions, except

1.  Storage of food

2.  Vegetative propagation

3.  Assimilation

4.  Perennation

Identify the correct statement regarding the stem morphology from the following:

Which one of the following organisms is correctly matched with its three characteristics? 
1. Pea: C₃ pathway, Endospermic seed, Vexillary aestivation
2. Tomato: Twisted aestivation, Axile placentation, Berry
3. Onion: Bulb, Imbricate aestivation, Axile placentation
4. Maize : C₃ pathway, Closed vascular bundles, Scutellum

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)

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