chapter 2

The tapetal nuclei in anthers of many angiosperm flowers are

• A) Mostly aneuploid

• B) Mostly polyploid

• C) Mostly haploid

• D) Not having complete haploid genome

The function of innermost layer of pollen sac, tapetum is

• A) Dehiscence

• B) Mechanical

• C) Protective

• D) Nutritive

In a pollen grain, larger nucleus is

• A) Generative nucleus

• B) Tube nucleus

• C) macro nucleus

• D) None of these

The anther wall consists of four wall layers where

• A) Endothecium lies inner to middle layers

• B) Tapetum lies just inner to endothecium

• C) Tapetum lies next to epidermis

• D) Middle layers lie between endothecium and tapetum

Mature male gametophyte is made up of

• A) One cell

• B) Two cells

• C) Three cells

• D) Four cells

Which of these is the haploid in anther cultures?

• (a) anther wall

• (b) tapetal layer of anther wall

• (c) connective tissue

• (d) young pollen grains

Endothecium layer of anther lobes is present

• a)Outside the epidermis

• b)In the innermost layer

• (c) Just inside the epidermis

• (d) In the middle region

During meiosis in pollen mother cell the daughter cells are interconnected by passages. The whole structure is called

• a)Symplast

• (b)Plasmodesmata

• (C) Syncytium

• (d) Coenocyte

The function of endothecium is

• a) Nutritional

• (b) Mechanical support

• (c) Dehiscence

• d) Development

How many pollen grains are formed from 10 microspore mother cells by meiosis

• A) 80

• B) 40

• C) 20

• D) 10