Multiple Choice Questions

Advertisement

The aleurone layer in maize grain is specially rich in

  • starch

  • lipids

  • protein

  • cellulose


C.

protein

In monocotyledons the seeds are generally endospermous. It is surrounded by a special one cell thick layer called aleurone layer. It is filled with aleurone grains which are proteinaceous in nature. Other components of this layer are phytin, carbohydrates and small amount of phospholipids are also present.


Advertisement

Ruminate endosperm occurs in

  • Annonaceae/Areca nut

  • Compositae

  • Cruciferae

  • Euphorbiaceae


Cleavage polyembryony occurs in

  • Pinus

  • Mini Cycas

  • Cycas

  • Ephedra


The development ofsporangium in Pteridium is

  • a leptosporangiate type

  • an eusporangiate type

  • Both (a) and (b)

  • None of the above


The edible part of apple/ pear is

  • cotyledons

  • thalamus/ receptacle

  • mesocarp

  • endocarp


Advertisement

What type of sorus is present in Nephrolepsis?

  • Coenosorus

  • Simple

  • Mixed

  • None of these


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

  • chasmogamaus

  • apogamous

  • cleistogamous

  • polygamous


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


In a flowering plant, archesporium gives rise to

  • wall and tapetum

  • only tapetum and sporogenous cells

  • only wall of the sporangium

  • both wall and sporogenous cells


Advertisement
<

The growth of pollen tube towards embryo sac is

  • geotropism

  • chemotaxis

  • thigmotaxis

  • phototaxis


Advertisement