In Bougainvillea, thorns are the modifications of

(1) stipules

(2) adventitious root

(3) stem

(4) leaf

Coconut fruit is a

1. drupe

2. berry

3. nut

4. capsule

The term 'polyadelphous' is related to 

1. gynoecium

2. androecium

3. corolla

4. calyx

How many plants among Indigofera, Sesbania, Salvia, Allium, Aloe, mustard, groundnut, raddish, gram and turnip have stamens with different lengths in their flowers?

(1) Three

(2) Four

(3) Five

(4) Six

Radial symmetry is found in the flowers of 

(1) Brassica

(2) Trifolium

(3) Pisum

(4) Cassia

Free-central placentation is found in

(1) Dianthus

(2) Argemone

(3) Brassica

(4) Citrus

Tricarpellary, syncarpous and gynoecium is found in flowers of

1. Solanaceae

2. Fabaceae

3. Poaceae

4. Liliaceae

Cotyledon of maize grain is called

1. coleorhiza

2. coleoptile

3. scutellum

4. plumple

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