Sexual Reproduction In Flowering Plants
247 Questions
Start Allen Test
Q226
Allen
11. ANALYTICAL QUESTIONS
MCQ
Pollen tube develops from :-
A.
Generative cell
B.
Male gametes
C.
Vegetative cell
D.
Vegetative nucleus
Q227
Allen
11. ANALYTICAL QUESTIONS
MCQ
What does the filiform apparatus do at the entrance into ovule?
A.
It brings about opening of the pollen tube
B.
It guides pollen tube from a synergid to egg
C.
It helps in the entry of pollen tube into a synergid
D.
It prevents entry of more than one pollen tube into the embryo sac
Q228
Allen
11. ANALYTICAL QUESTIONS
MCQ
Pollen grains are able to withstand extremes of temperature and dessication because their exine is composed of :—
A.
Cutin
B.
Suberin
C.
Sporopollenin
D.
Callose
Q229
Allen
11. ANALYTICAL QUESTIONS
MCQ
Go through the following
statements:-
(I) Flowers are small. They are often packed in inflorescence
(II) Flowers are colourless, nectar less and odourless
(III) Well exposed stamens
(IV) Pollen grains are produced in large numbers which are light and non-sticky
(V) Flower often have a single ovule in each ovary.
(VI) Stigma is large and often feathery. The above contrivances favour
statements:-
(I) Flowers are small. They are often packed in inflorescence
(II) Flowers are colourless, nectar less and odourless
(III) Well exposed stamens
(IV) Pollen grains are produced in large numbers which are light and non-sticky
(V) Flower often have a single ovule in each ovary.
(VI) Stigma is large and often feathery. The above contrivances favour
A.
Cross pollination
B.
Anemophily (pollination by wind)
C.
Ornithophily (pollination by birds)
D.
Entomophily (pollination by insects)
Q230
Allen
11. ANALYTICAL QUESTIONS
MCQ
Which of the following is the tallest flower?
A.
Vallisneria
B.
Rafflesia
C.
Amorphophallus
D.
Zostera
Q231
Allen
11. ANALYTICAL QUESTIONS
MCQ
Endosperm is formed during the double fertilization by :-
A.
Two polar nuclei and one male gamete
B.
One polar nuclei and one male gamete
C.
Ovum and male gamete
D.
Two polar nuclei and two male gametes
Q232
Allen
11. ANALYTICAL QUESTIONS
MCQ
In Angiosperms pollen tube liberate their male gametes into the :-
A.
Central cell
B.
Antipodal cells
C.
Egg cell
D.
Synergid
Q233
Allen
11. ANALYTICAL QUESTIONS
MCQ
In which part of embryo maximum growth takes place in hypogeal germination: -
A.
Plumule
B.
Radicle
C.
Epicotyl
D.
Hypocotyl
Q234
Allen
11. ANALYTICAL QUESTIONS
MCQ
In seeds, characterised by hypogeal germination, cotyledons generally do not becomes green because :-
A.
They lack mitochondria
B.
They developed very early
C.
They contain inhibitor
D.
They remain below the soil
Q235
Allen
11. ANALYTICAL QUESTIONS
MCQ
Which of the following will lose its economic value if fruits are produced through parthenocarpy?
A.
Citrus
B.
Banana
C.
Grapes
D.
Pomegranate
Q236
Allen
11. ANALYTICAL QUESTIONS
MCQ
In which method megaspore mother cell directly gives rise to an embryo sac without meiosis?
A.
Diplospory
B.
Adventive embryony
C.
Apospory
D.
Apogamy
Q237
Allen
11. ANALYTICAL QUESTIONS
MCQ
Given below are two statements:-
Statement-I: When pollen grains are released from pollen sac and they land on stigma of pistil, it is called pollination.
Statement-II:Pollen tube enters into embryo sac where two male gametes fuse with female gamete.
In the light of the above statements,
choose the most appropriate answer from the options given below:
A.
Both Statement-I and Statement-II are correct.
B.
Statement-I is correct but statement-II is incorrect.
C.
Statement-I is incorrect and Statement-II is correct.
D.
Both Statement-I and Statement-II are incorrect.
Q238
Allen
11. ANALYTICAL QUESTIONS
MCQ
Given below are two statements:-
Statement-I: A typical anther is tetrasporangiate.
Statement-II: A typical anther is dithecous.
In the light of the above statements,
choose the most appropriate answer from the options given below:
A.
Both Statement-I and Statement-II are correct.
B.
Statement-I is correct but statement-II is incorrect.
C.
Statement-I is incorrect and Statement-II is correct.
D.
Both Statement-I and Statement-II are incorrect.
Q239
Allen
11. ANALYTICAL QUESTIONS
MCQ
Given below are two statements:-
Statement-I:Exine of pollen grain is made up of sporopollenin.
Statement-II: Intine helps in germination of pollen grain.
In the light of the above statements,
choose the most appropriate answer from the options given below:
A.
Both Statement-I and Statement-II are correct.
B.
Statement-I is correct but statement-II is incorrect.
C.
Statement-I is incorrect and Statement-II is correct.
D.
Both Statement-I and Statement-II are incorrect.
Q240
Allen
11. ANALYTICAL QUESTIONS
MCQ
Given below are two statements:-
Statement-I: To some extent viability of pollen grains depends upon prevailing temperature and humidity.
Statement-II: Viability is lost in few minutes only of the pollen grains of Solanaceae family.
In the light of the above statements,
choose the most appropriate answer from the options given below:
A.
Both Statement-I and Statement-II are correct.
B.
Statement-I is correct but statement-II is incorrect.
C.
Statement-I is incorrect and Statement-II is correct.
D.
Both Statement-I and Statement-II are incorrect.
Q241
Allen
11. ANALYTICAL QUESTIONS
MCQ
Given below are two statements (for angiosperm plants) :-
Statement-I : A mature male gametophyte possess two male gametes.
Statement-II: A mature female gametophyte is 7-celled and 8 nucleated in typical angiosperms.
In the light of the above statements,
choose the most appropriate answer from the options given below:
A.
Both Statement-I and Il are correct.
B.
Statement-I is correct but statement-Il is incorrect.
C.
Statement-I is incorrect and Statement-II is correct.
D.
Both Statement-I and Statement-II are incorrect.
Q242
Allen
11. ANALYTICAL QUESTIONS
MCQ
Given below are two statements; one is labelled as Assertion (A) and the other is labelled as
Reason(R) :-
Assertion (A) : Geitonogamy is genetically same as autogamy.
Reason (R) : In Geitonogamy transfer of pollen grains occur from one plant to another plant.
In the light of the above statements,
choose the most appropriate answer from the options given below :
Reason(R) :-
Assertion (A) : Geitonogamy is genetically same as autogamy.
Reason (R) : In Geitonogamy transfer of pollen grains occur from one plant to another plant.
In the light of the above statements,
choose the most appropriate answer from the options given below :
A.
If (A) & (R) both are correct but (R) is not the correct explanation of (A).
B.
(A) is correct but (R) is incorrect.
C.
(A) is not correct but (R) is correct.
D.
If (A) & (R) both are correct and (R) is the correct explanation of (A).
Q243
Allen
11. ANALYTICAL QUESTIONS
MCQ
Given below are two statements; one is labelled as Assertion (A) and the other is labelled as
Reason(R) :-
Assertion (A) : Homogamy in receptivity by stigma and pollen release is essential for autogamy.
Reason (R) : Heterogamy increases the opportunities for successful allogamy.
In the light of the above statements,
choose the most appropriate answer from the options given below :
Reason(R) :-
Assertion (A) : Homogamy in receptivity by stigma and pollen release is essential for autogamy.
Reason (R) : Heterogamy increases the opportunities for successful allogamy.
In the light of the above statements,
choose the most appropriate answer from the options given below :
A.
If (A) & (R) both are correct but (R) is not the correct explanation of (A).
B.
(A) is correct but (R) is incorrect.
C.
(A) is not correct but (R) is correct.
D.
If (A) & (R) both are correct and (R) is the correct explanation of (A).
Q244
Allen
11. ANALYTICAL QUESTIONS
MCQ
Given below are two statements; one is labelled as Assertion (A) and the other is labelled as Reason(R) .
Assertion (A) : Loss of pollen grain occur maximum in anemophily.
Reason (R) : In this type of pollination, pollen grains move completely in nondirectional form.
In the light of the above statements,
choose the most appropriate answer from the options given below :
Assertion (A) : Loss of pollen grain occur maximum in anemophily.
Reason (R) : In this type of pollination, pollen grains move completely in nondirectional form.
In the light of the above statements,
choose the most appropriate answer from the options given below :
A.
If (A) & (R) both are correct but (R) is not the correct explanation of (A).
B.
(A) is correct but (R) is incorrect.
C.
(A) is not correct but (R) is correct.
D.
If (A) & (R) both are correct and (R) is the correct explanation of (A).
Q245
Allen
11. ANALYTICAL QUESTIONS
MCQ
Given below are two statements; one is labelled as Assertion (A) and the other is labelled as
Reason (R) :-
Assertion (A): In angiosperm plants, nuclear endosperm is most common.
Reason (R): When formation of endosperm occur due to free nuclear division, is called cellular endosperm.
In the light of the above statements,
choose the most appropriate answer from the options given below :
Reason (R) :-
Assertion (A): In angiosperm plants, nuclear endosperm is most common.
Reason (R): When formation of endosperm occur due to free nuclear division, is called cellular endosperm.
In the light of the above statements,
choose the most appropriate answer from the options given below :
A.
If (A) & (R) both are correct but (R) is not the correct explanation of (A).
B.
(A) is correct but (R) is incorrect.
C.
(A) is not correct but (R) is correct.
D.
If (A) & (R) both are correct and (R) is the correct explanation of (A).
Q246
Allen
11. ANALYTICAL QUESTIONS
MCQ
Identify the correct set of statements :-
(a) Wolfia is a microscopic plant belongs to angiosperms.
(b) Double fertilization is an unique event seen in gymnosperms.
(c) Male sex organs in angiosperm are called stamens, present in flowers.
(d) Total three male gametes participate in double fertilization.
(a) Wolfia is a microscopic plant belongs to angiosperms.
(b) Double fertilization is an unique event seen in gymnosperms.
(c) Male sex organs in angiosperm are called stamens, present in flowers.
(d) Total three male gametes participate in double fertilization.
A.
all a, b, c, d are correct
B.
b, c and d are correct
C.
a, c and d are correct
D.
only a and c are correct
Q247
Allen
11. ANALYTICAL QUESTIONS
MCQ
Identify the correct set of statements :-
(a) In gymnosperms seeds are not enclosed by fruits.
(b) Angiosperm plant’s possess diplontic life cycle.
(c) Flower is the structure in which sexual reproductive organs of angiosperm are present.
(d) Endosperm formation in angiosperm is not a per-fertilization event.
(a) In gymnosperms seeds are not enclosed by fruits.
(b) Angiosperm plant’s possess diplontic life cycle.
(c) Flower is the structure in which sexual reproductive organs of angiosperm are present.
(d) Endosperm formation in angiosperm is not a per-fertilization event.
A.
only b, c & d are correct
B.
b and c are correct
C.
a, b, c and d all are correct
D.
only a and c are correct