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

Proximal end of the filament of stamen is attached to the

(1) connective

(2) placenta

(3) thalamus or petal

(4) anther

Stems modified into flat green organs performing the functions of leaves are known as

(1) phyllodes

(2) phylloclades

(3) scales

(4) cladodes

The standard petal of a papilionaceous corolla is also called

(1) pappus

(2) vexillum

(3) corona

(4) carina

Roots play insignificant role in absorption of water in

1. sunflower

2. Pistia

3. pea

4. wheat

Axile placentation is present in

1. dianthus                   

2. lemon

3. pea                           

4. Argemone

Among China rose, mustard, brinjal, potato, guava, cucumber, onion and tulip, how many

plants have superior ovary?

1. Five                         

2. Six

3. Three                       

4. Four

Perigynous flowers are found in 

1. Guava

2. Cucumber

3. China rose

4. Rose

Leaves become modified into spines in

1. Opuntia

2. pea

3. onion

4. silk cotton

The hilum is a scar on the

1. seed, where funicle was attached

2. fruit, where it was attached to the pedicel

3. fruit, where style was present

4. seed, where micropyle was present