Advertisements
Advertisements
प्रश्न
Transmitting tissue is found in
पर्याय
Micropylar region of ovule
Pollen tube wall
Stylar region of gynoecium
Integument
उत्तर
Stylar region of gynoecium
संबंधित प्रश्न
Double fertilization is reported in plants of both, castor and groundnut. However, the mature seeds of groundnut are non-albuminous and castor are albuminous. Explain the post fertilization events that are responsible for it.
Read the following statement and answer the questions that follow :
"A guava fruit has 200 viable seeds."
(a) What are viable seeds?
(b) Write the total number of :
(i) Pollen grains (ii) Gametes
in producing 200 viable guava seeds.
c) Prepare a flow-chart to depict the post-pollination events leading to viable-seed production in a flowering plant.
Differentiate between outbreeding and outcrossing.
Match the items in Column A with those in Column B.
|
Column A |
Column B |
|
(a) Generative nucleus |
(i) Pollen tube |
|
(b) Germ pore |
(ii) Endosperm nucleus |
|
(c) Exine |
(iii) Testa |
|
(d) Secondary nucleus |
(iv) Fertilization |
|
(e) Integument |
(v) Male nuclei |
|
(f) Egg nucleus |
(vi) Rough |
Given ahead is a diagrammatic sketch of the sectional view of a germinating pollen grain. Study the same and then answer the question that follows:
Name the parts labelled 1, 2, 3, 4 and 5.
Explain the pollination process in maize.
What happens to the ovary post fertilization?
The question has four options. Choose the correct answer:
The study of fruits is known as
Long Answer Question:
Draw a labeled diagram of the L.S. of anatropous ovule and list the components of the embryo sac and mention their fate after fertilization.
After fertilization the ovule becomes ______.
What is Mellitophily?
‘Pollination in Gymnosperms is different from Angiosperms’ – Give reasons.
Write a short note on Heterostyly.
Which of the following is the CORRECT sequence of events during double fertilization in Angiosperms?
By which of the following the megasporangium proper of an angiosperm ovule is represented?
Double fertilization was first discovered by Nawaschin (1898) in ______.
Double fertilization is a distinctive feature of ______.
Can an unfertilised, apomictic embryo sac give rise to a diploid embryo? If yes, then how?
Identity the part of embryo sac which takes part in formation of primary endosperm nucleus during fertlisation
