MEDIUM
Earn 100
What are the labels A and B indicate in the given picture of a pollen grain?
Important Questions on Sexual Reproduction in Flowering Plants
HARD
Describe the structure of a typical angiospermic microsporangium with a diagram. Also, explain the function of each part.
MEDIUM
Where are the sporopollenin present in the male gametophyte of an angiosperm? Mention the function of it.
HARD
Why meiosis is essential at the time of sporogenesis in angiosperms? Explain the process of formation of male gametophyte in angiosperms with suitable diagrams.
EASY
In Angiosperms, microsporogenesis and megasporogenesis:
EASY
The hard outer layer of pollens, named exine, is made of
EASY
Pollen grains are well-preserved as fossils because of the presence of _____.
EASY
Where are the germ pore present in the male gametophyte of an angiosperm? Mention the function of it.
EASY
Ubisch bodies are produced from ___.
MEDIUM
Choose the correct statement.
A) Several hormonal and structural changes are initiated for the development of floral primordium.
B) Each anther will have two sporangia at the sides.
C) Stomium will be useful for the dehiscence of pollen sacs.
D) Pollen grains can be stored at .
E) Pollen viability in rice will be days.
MEDIUM
Arrange the sequence of events in microsporogenesis.
(A) Disassociation of microspore as pollen grains
(B) Anther maturation and dehydration
(C) Pollen mother cell undergoes meiotic division
(D) Microspore tetrad
HARD
With the help of a well-labelled diagram, describe the development of a male gametophyte of an angiosperm. What is sporopollenin.
EASY
Which one of the following statements is not true?
HARD
Which of the following has proved helpful in preserving pollen as fossils?
HARD
Observe the diagram of the young anther given below:
Identify the parts labelled as A, B, C and D.
HARD
Which one of the following statements is not true?
MEDIUM
Assertion Xenogamy involves transfer of pollen grains from the flower of one plant to the stigma of another plant.
Reason This is the only type of pollination which brings genetically different types of pollen grains to the stigma.
The correct answer is:
EASY
If we explore anther wall from outside to inside then which sequence will be correct?
A- Endothecium
B- Tapetum
C- Epidermis
D- Middle Layer
HARD
Mateh the following?
| Column - I | Column - II | Column - III | |||
| (a) | Epidermis | (i) | Multi nucleated | (p) | Protection |
| (b) | Endothecium | (ii) | Homogenous | (q) | Formation of Micropores |
| (c) | Tapetum | (iii) | One celled thick | (r) | dehiscence of anther |
| (d) | Sporogenous tissue | (iv) | Fibrous thickness | (s) | Nourishment |
EASY
Pollen tablets are available in the market for:
EASY
Male gametophyte in angiosperms produces :
