Pre-Fertilization Events in Plants
Pre-Fertilization Events in Plants: Overview
This Topic covers sub-topics such as Emasculation, Pollen Grain, Microsporogenesis, Megasporogenesis, Pollen Allergy, Embryo Sac, Synergids, Palynology, Nucellus, Pollinium, Sporopollenin, Pollen Viability, Megaspore, Filiform Apparatus and, Polar Nuclei
Important Questions on Pre-Fertilization Events in Plants
In the given figure of embryo sac, choose the option that is correctly showing the parts (1), (2), (3) and (4).
Match the following:
| Column-I | Column-II | ||
| (a) | Coleorhiza | (i) | Birth cord |
| (b) | Umbilical cord | (ii) | The outer wall of a spore or pollen grain |
| (c) | Germ pores | (iii) | A sheath protecting the root of a germinating grass or cereal grain |
The process of development of pollen mother cell into a mature pollen grain includes:
The megaspores are formed from megaspore mother cell that are produced in which of the following region of ovule:
Pollen grains are able to withstand extremes of temperature and dessication because their exine is composed of
Statement-I: Pollen mother cells (PMCs) are the first male gametophytic cells.
Statement-II: Each PMC gives rise to two pollens.
Assertion : If pollen mother cells has 42 chromosomes, the pollen has only 21 chromosomes.
Reason : Pollens are formed after meiosis in pollen mother cell.
Find the odd one out.
Which of the following pairs has haploid structures?
Embryo sac occurs in
Male gametophyte of angiosperms/ monocots is
What does dehiscence mean?
Innermost layer of anther wall whose cells nourish the developing pollen grain is
In angiosperms anthers are ________.
Development of single embryo sac from MMC is called?
What is the use of generative and vegetative cell?
Identify the correct statement from the following:
A) In Loranthus, the ovule is not covered by any integuments.
B) In Sunflower, a single ovule is seen in the ovary.
C) Pollen banks store selected pollen at .
D) In Hibiscus, anther is dithecous.
E) In rice pollen grains are viable for months.
The correct answer is:
Stigma of wind-pollinated plants are:
In the given diagram, nucleated stage of the embryo sac is shown. Select the option with the correct identification.
Pollination occurring in closed flower is called as
