Every question from past board papers on Flower structure, male and female gametophytes, newest paper first. Open any question for its full worked 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) : 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 :
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?
Identify the correct description about the given figure:
A typical angiosperm embryo sac at maturity is :
The plant parts which consist of two generations - one within the other :
(a) Pollen grains inside the anther
(b) Germinated pollen grain with two male gametes
(c) Seed inside the fruit
(d) Embryo sac inside the ovule
The body of the ovule is fused within the funicle at :
Which of the following flowers only once in its life-time ?
Which of the following has proved helpful in preserving pollen as fossils ?
Pollen grains can be stored for several years in liquid nitrogen having a temperature of
Functional megaspore in an angiosperm develops into :
Which one of the following statements is not true ?
In majority of angiosperms
The ovule of an angiosperm is technically equivalent to
