Q.2 Embryo sac is to ovule as ......... is to an anther.

1. stamen

2. filament

3. pollen grain

4. androecium

A dicotyledonous plant bears flowers, but never produces fruits and seeds. The most probable cause for the above situation is

The outermost and innermost wall layers of microsporangium in an anther are respectively.

1. Endothecium and tapetum

2. Epidermis and endodermis

3. Epidermis and middle layer

4. Epidermis and tapetum

During microsporogenesis, meiosis occurs in

1. endothecium

2. microspore mother cells

3. microspore tetrads

4. pollen grains

From among the sets of terms given below, identify those that are associated with the gynoecium :

1. Stigma, ovule, embryo sac, placenta

2. Thalamus, pistil, style, ovule

3. Ovule, ovary, embryo sac, tapetum

4. Ovule, stamen, ovary, embryo sac

Starting from the innermost part, the correct sequence of parts in an ovule is

1. egg, nucellus, embryosac, integument

2. egg, embryosac, nucellus, integument

3. embryosac, nucellus, integument, egg

4. egg, integument, embryo sac, nucellus

From the statements given below choose the option that is true for a typical female gametophyte.

1. (i) and (iv)             

2. (ii) and (iii)

3. (i) and (ii)                       

4. (ii) and (iv)

Autogamy can occur in a chasmogamous flower if

1. pollen matures before maturity of ovule

2. ovules mature before maturity of pollen

3. both pollen and ovules mature simultaneously

4. both anther and stigma are of equal lengths

Q. 12 A particular species of plant produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These modifications facilitate pollination by
1. insects     

2. water     

3. wind     

4. animals