Coconut fruit is a

1. drupe

2. berry

3. nut

4. capsule

Root hairs develop from the region of

(1) maturation

(2) elongation

(3) root cap

(4) meristematic activity

Cotyledon of maize grain is called

1. coleorhiza

2. coleoptile

3. scutellum

4. plumple

The term 'polyadelphous' is related to 

1. gynoecium

2. androecium

3. corolla

4. calyx

Free-central placentation is found in

(1) Dianthus

(2) Argemone

(3) Brassica

(4) Citrus

In Bougainvillea, thorns are the modifications of

(1) stipules

(2) adventitious root

(3) stem

(4) leaf

Tricarpellary, syncarpous and gynoecium is found in flowers of

1. Solanaceae

2. Fabaceae

3. Poaceae

4. Liliaceae

Radial symmetry is found in the flowers of 

(1) Brassica

(2) Trifolium

(3) Pisum

(4) Cassia

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