Genetically different type of pollen grains land on stigma of ovary in
Geitonogamy
Homogamy
Cleistogamy
Xenogamy
Related Questions
The Intine of a pollen grain is mainly made up of?
cellulose, pectin
lipid, pectin
pectin, lignin
lignin, cutin
In a flowering plant, the pollen tube first arrives in?
egg
antipodal cell
synergid
central cell
Chiropterophily means?
pollination by snails
pollination by bats
pollination by wind
pollination by insects
Cells present in completely developed male gametophyte of flowering plants are.
2
5
3
4
Which of the following is NOT a characteristic of flowers pollinated by insects?
Large and colourful
Fragrant
Nectar-producing
Small and inconspicuous
Which of the following statement is/are true
I. Endothecium lies behind epidermis
II. Fusion of egg with male gamete is called apogamy.
III. Synergids are haploid
IV. The point at which funicle touches the ovule is raphe.
I and II
II and IV
I and III
III and IV
Pollens outer layer is called …A… . This is made up of …B… . This is absent on the …C… . Fill in the blanks A, B and C
A-Intine, B-organic compound, C-micropyle
A-exine, B-sporopollenin, C-germ pore
A-exine, B-intine, C-micropyle
A-micropyle, B-intine, C-exine
Mark the statement not true for an anatropous ovule.
Encloses single female gametophyte
The micropyle lies close to hilum
Its body is made of parenchymatous nucellus
Ploidy of funicle, nucellus and all cells of embryo sac are same
Pollen grains are shed at
1-celled stage
2- celled stage
2,3- celled stage
5- celled stage
Functional megaspore develops into …A… also called …B…
A and B in the above sentence is
A-Female gametophyte; B-Embryo sac
A-Embryo sac; B-Female gametophyte
A-Endosperm; B-Nucellus
A-Microsporangium; B-Megasporangium
