Sexual Reproduction in Flowering Plants · Biology · NEET
MCQ (Single Correct Answer)
Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : A typical unfertilised, angiosperm embryo sac at maturity is 8 nucleate and 7-celled.
Reason (R) : The egg apparatus has 2 polar nuclei.
In the light of the above statements, choose the correct answer from the options given below :
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Both wind and water pollinated flowers are not very colourful and do not produce nectar.
Reason (R) : The flowers produce enormous amount of pollen grains in wind and water pollinated flowers.
In the light of the above statements, choose the correct answer from the options given below:
How many meiotic and mitotic divisions need to occur for the development of a mature female gametophyte from the megaspore mother cell in an angiosperm plant?
Given below are two statements :
Statement I : Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it.
Statement II : Fig wasp and fig tree exhibit mutual relationship as fig wasp completes its life cycle in fig fruit and fig fruit gets pollinated by fig wasp.
In the light of the above statements, choose the most appropriate answer from the options given below:
Given below are two statements : One is labelled as Assertion (A) and other is labelled as Reason (R).
Assertion (A) : Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus.
Reason (R) : Presence of more than one nucleus in the tapetum increases the efficiency of nourishing the developing microspore mother cells.
In light of the above statements, choose the most appropriate answer from the options given below:
Match List I with List II :
| List - I |
List - II |
||
|---|---|---|---|
| A | Scutellum | I | Persistent nuclellus |
| B | Non-albuminous seed | II | Cotyledon of Monocot seed |
| C | Epiblast | III | Groundnut |
| D | Perisperm | IV | Rudimentary cotyledon |
Choose the option with all correct matches.
Which part of the ovule stores reserve food materials?
Pollen grains remain preserved as fossils due to the presence of :
The part marked as ‘x’ in the given figure is
Identify the set of correct statements:
A. The flowers of Vallisneria are colourful and produce nectar.
B. The flowers of water lily are not pollinated by water.
C. In most of water-pollinated species, the pollen grains are protected from wetting.
D. Pollen grains of some hydrophytes are long and ribbon like.
E. In some hydrophytes, the pollen grains are carried passively inside water.
Choose the correct answer from the options given below.
Identify the correct description about the given figure :
In which of the following sets of families, the pollen grains are viable for months?
Transfer of pollen grains from anther to stigma of another flower of same plant is known as :
In angiosperms the correct sequence of events in formation of female gametophyte in the ovule is :
(A) 3 successive free nuclear divisions functional megaspore.
(B) Degeneration of 3 megaspores.
(C) Meiotic division in megaspore mother cell.
(D) Migration of 3 nuclei towards each pole.
(E) Formation of wall resulting in seven celled embryosac.
Choose the correct answer from the options given below :
What is the function of tassels in the corn cob?
Large, colourful, fragrant flowers with nectar are seen in
In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are :
Given below are two statements : One labelled as Assertion A and the other labelled as Reason R :
Assertion A : In gymnosperms the pollen grains are released from the microsporangium and carried by air currents.
Reason R : Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed.
In the light of the above statements, choose the correct answer from the options given below :
The residual persistent part which forms the perisperm in the seeds of beet is
To ensure that only the desired pollens fall on the stigma in artificial hybridization process
(a) the female flower buds of plant producing unisexual flowers need not be bagged.
(b) there is no need to emasculate unisexual flowers of selected female parent
(c) emasculated flowers are to be bagged immediately after cross pollination
(d) emasculated flowers are to be bagged after removal of anthers
(e) bisexual flowers, showing protogyny are never selected for cross
Choose the correct answer from the options given belows
In general the egg apparatus of embryo sac in angiosperm consists of
Given below are two statements:
Statement I : Cleistogamous flowers are invariably autogamous
Statement II : Cleistogamy is disadvantageous as there is no chance for cross pollination
In the light of the above statements, choose the correct answer from the options given below :
Identify the incorrect statement related to Pollination:
(i) Pollen grains inside the anther
(ii) Germinated pollen grain with two male gametes
(iii) Seed inside the fruit
(iv) Embryo sac inside the ovule
