EASY
Earn 100
Explain the development of the male gametophyte.
Important Questions on Structural Organisation in Plants
EASY
Pollen grains are well-preserved as fossils because of the presence of _____.
EASY
In Angiosperms, microsporogenesis and megasporogenesis:
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?
EASY
The hard outer layer of pollens, named exine, is made of
HARD
Which of the following has proved helpful in preserving pollen as fossils?
HARD
Describe the structure of a typical angiospermic microsporangium with a diagram. Also, explain the function of each part.
EASY
Which one of the following statements is not true?
MEDIUM
Where are the sporopollenin present in the male gametophyte of an angiosperm? Mention the function of it.
EASY
Where are the germ pore present in the male gametophyte of an angiosperm? Mention the function of it.
EASY
Male gametophyte in angiosperms produces :
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
EASY
Which is the most common mechanism of genetic variation in the population of sexually-reproducing organism?
HARD
With the help of a well-labelled diagram, describe the development of a male gametophyte of an angiosperm. What is sporopollenin.
EASY
The hilum is a scar on the:
EASY
Which one of the following generates new genetic combinations leading to variation?
EASY
The ovule of an angiosperm is technically equivalent to
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.
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 |
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.
