Biology : Sexual Reproduction in flowering Plants

The aleurone layer in maize grain is specially rich in

• starch

• lipids

• protein

• cellulose

The growth of pollen tube towards embryo sac is

• geotropism

• chemotaxis

• thigmotaxis

• phototaxis

A hyaline bisexual and self-fertilized flower that does not open at all is

• chasmogamaus

• apogamous

• cleistogamous

• polygamous

Cleavage polyembryony occurs in

• Pinus

• Mini Cycas

• Cycas

• Ephedra

Ruminate endosperm occurs in

• Annonaceae/Areca nut

• Compositae

• Cruciferae

• Euphorbiaceae

The edible part of apple/ pear is

• cotyledons

• thalamus/ receptacle

• mesocarp

• endocarp

What is true about a gamo spermous apospory?

• Formation of embryo from egg of embryo sac proliferated from a nucellar cell

• Formation of embryo from egg of embryo sac formed directly from megaspore mother cell

• Formation of embryo directly from nucellus

• Formation of embryo directly from integument

Seed which are able to withstand reduction in moisture and temperature are called

• dormant seeds

• recalcitrant seeds

• orthodox seeds

• non- viable seeds

Anthesis means

• growth of pollen tube inside the carpel

• dehiscence of anthers

• opening of floral bud

• emergence of anthers

Outgrowth developing along with hilum of the seed is:

• Plumule

• Radicle

• Strophiole

• Perisperm