Assertion : Protandry and protogyny ensures cross fertilization.

Reason : Cross fertilization introduces variation in progeny.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion : Pollen mother cells (PMCs) are the first male gametophytic cells.

Reason : Each PMC gives rise to two pollens.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Which one of the following pairs of plant structures has haploid number of chromosomes

• Nucellus and antipodal cells

• Egg nucleus and secondary nucleus

• Megaspore mother cell and antipodal cells

• Egg cell and antipodal cells

Assertion : Emasculation prevents self- pollination in flowers.

Reason : Emasculation is the removal of anthers from a bisexual flower.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion: Maize is an albuminous seed. 

Reason: Endosperm is completely absorbed by its growing embryo

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Apomixis is

• formation of seeds by fusion of gametes

• formation of seeds without syngamy and meiosis

• formation of seeds with syngamy but no meiosis

• none of the above

Assertion: Nuclear endosperm is formed by subsequent nuclear division without wall formation.

Reason: Coconut is an example of such endosperm, where the endosperm remains nuclear throughout the development of the fruit

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion : Vegetable oils are fats which are present in plant cells in soluble form.

Reason : Vegetable oils occur only in cells of embryo.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

249.

Plants of which one of the following groups of genera arc pollinated by the same agency

• Triticum, Cocos, Mangifera

• Ficus, Kigelia, Casuarina

• Salvia, Morus, Euphorbia

• Bombax, Butea, Bauhinia

In which one of the following would you expect to find glyoxysomes?

• Endosperm of wheat

• Endosperm of castor

• Palisade cells in leaf

• Root hairs