The term 'polyadelphous' is related to 

1. gynoecium

2. androecium

3. corolla

4. calyx

Proximal end of the filament of stamen is attached to the

(1) connective

(2) placenta

(3) thalamus or petal

(4) anther

The standard petal of a papilionaceous corolla is also called

(1) pappus

(2) vexillum

(3) corona

(4) carina

How many plants among Indigofera, Sesbania, Salvia, Allium, Aloe, mustard, groundnut, radish, 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?