EASY
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What is Chalazogamy in plants?

Important Questions on Sexual Reproduction in Flowering Plants

EASY
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
Which cell of the female gametophyte is involved in the formation of primary endosperm nucleus (PEN) after fertilization ?
MEDIUM
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
Which of the following statements is not correct?
MEDIUM
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
The additional nuclear ploidy levels found in a diploid angiosperm species in full bloom compared to its vegetative stage are
HARD
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
What is triple fusion? Name the nuclei involved in triple fusion.
EASY
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
Double fertilization is exhibited by:
MEDIUM
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
Describe the process of double fertilisation in angiosperms. What is its significance?
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Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
An angiosperm was identified with its endosperm of 6n. Assuming that this is a self-pollinating species, which one of the following is the correct ploidy of the parent?
MEDIUM
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
What is triple fusion? What are the nuclei involved in triple fusion?
MEDIUM
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
A flower with Tt genotype is cross - pollinated by TT pollens. What will the genotypes of the resulting endosperm and embryo, respectively, be?
EASY
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
Union of Pronuclei of the gametes is called ___.
HARD
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization

What is double fertilization? Describe the process with diagrams from the stage of megaspore formation to zygote formation.

HARD
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
Explain the events up to double fertilization after the pollen tube enters one of the synergids in an ovule of an angiosperm.
MEDIUM
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
What is triple fusion? Write the significance of it.
EASY
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
Angiospermic plants are characterised by
(i) Double fertilisation
(ii) Triploid endosperm
(iii) Diploid endosperm
Choose the correct option from the following regarding above statements?
EASY
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
Define triple fusion. What is the product of this process?
EASY
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
Describe double fertilization diagrammatically.
MEDIUM
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
Why the process of fertilization in angiosperm is referred as double fertilization?
HARD
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
An apple showing monosporic type of embryo sac development assumed to develop a fruit with 12 seeds. Find out the no. of chromosomes present in megaspore mother cell, functional megaspores, egg cells, synergids, antipodals, zygote and PEN
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Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
If the tip of the pollen tube enters into the embryo sac of the ovule through micropyle then it is called 
MEDIUM
Biology>Reproduction>Sexual Reproduction in Flowering Plants>Double Fertilization
Identify the correct order of events in pollen-pistil interaction from the options given below:
I. Release of male gametes into the embryo sac.
II. Deposition of pollen grains on stigma.
III. Entry of pollen tube into embryo sac.
IV. Development of pollen tube.
V. Entry of pollen tube into the Ovule.