Sporopollenin

a) Vegetative cell  , Generative cell

b) Vegetative

a.Filiform apparatus

 b. They play an important role in  guiding the pollen tubes into the

A: Pericarp

B:Endosperm

C:Scutellum

D:Plumule

E:Radicle

F:coleorhiza

G:

Flowers are

• Large 
• Colourful
• Fragrant
• Rich in nectar
•   Pollen grains areDownload App and View Complete Answer for FREE

Perisperm

One of the male gametes moves towards the egg cell and fuses with its nucleus thus completing the syngamy. This results in the formation of a diploid cell, the

• Pollen grains are light 
• Pollen grains are non-sticky
• Possess well-exposed stamens
• Feathery stigma
• FlowersDownload App and View Complete Answer for FREE

Pollen grains are rich in nutrients.

Pollen consumption has been claimed to increase the performance of athletes and race horses.

Pollen grains of

a) Exine is made up of sporopollenin and intine is made up of cellulose and pectin.

b)Sporopollenin  is one of the most resistant organic material

The nucleus of the functional megaspore divides mitotically to form two nuclei which move to the opposite poles, forming the 2-nucleate embryo sac.

Two more

1.Emasculation- protects the flower from self pollen.

2.Bagging-  protects the flower from unwanted

a) Zygote.

b)Primary endosperm cell/ PEC.

c) Primary endosperm nuclei / PEN.

d) Degenerating

a) Funicle

b) Micropyle.

c) Nucellus.

d) Embryo

a) Vegetative cell.

b) Generative cell

a.Small,floats in the cytoplasm of  the vegetative cell,spindle shaped,dense cytoplasm(any

a) Connective.

b) Epidermis.

c) Endothecium.

d) Sporogenous

a.Fruits formed without fertilisation

b.Apomixis

c.Fruits formed through

d) Perisperm 

The primary endosperm cell divides repeatedly and forms endosperm tissue.The cells of endosperm tissues are filled with reserve food materials and are used for

• Pollen release and stigma receptivity are not synchronised.
• The anther and stigma are placed at differentDownload App and View Complete Answer for FREE

Fruits which  develop only from the ovary are called true fruits.

In some plants other floral parts like thalamus also contribute to fruit formation.

Dicotyledonous embryo

• consists of an embryonal axis and two cotyledons.
• coleorrhiza and coleoptile areDownload App and View Complete Answer for FREE

Autogamy :Transfer of pollen grains from anther to the stigma of the same flower.

Geitonogamy:Transfer of pollen grains from anther to the stigma of another

Geitonogamy: Transfer of pollen grains from anther to the stigma of  another flower of the same plant.

Xenogamy: Transfer of pollen grains from anther

Cleistogamous flowers are those flowers which do not open at all.

Cleistogamous flowers  assure seed-set even in the absence of

Wind pollination

Light and non sticky pollen.

Exposed stamens.

Water