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Sexual Reproduction In Flowering Plants

554 Questions Start Allen Test
All Exams Allen Errorless
Q451 Allen ANALYTICAL QUESTIONS MCQ
If the leaf of Capsella has 46 number of chromosomes then how many chromosomes number will be there in endosperm :-
A.
46
B.
23
C.
69
D.
138
Q452 Allen ANALYTICAL QUESTIONS MCQ
If the nucellus cell of an Angiosperm contains 24 chromosomes the number of chromosomes present in pollen grain, endosperm & embryo will be:-
A.
24, 36, 24
B.
12, 36, 24
C.
12, 24, 36
D.
24, 12, 12
Q453 Allen ANALYTICAL QUESTIONS MCQ
In Angiosperm, if haploid number of chromosome is 12 then what will be the no. of chromosomes in integuments and synergids:-
A.
12, 12
B.
24, 12
C.
24, 24
D.
12, 24
Q454 Allen ANALYTICAL QUESTIONS MCQ
In Angiosperm, if number of chromosomes in endosperm is 30, what will be the no. of chromosomes in nucellus :-
A.
15
B.
30
C.
20
D.
40
Q455 Allen ANALYTICAL QUESTIONS MCQ
How many meiotic divisions are necessary for the formation of 100 functional megaspores:-
A.
25
B.
50
C.
100
D.
200
Q456 Allen ANALYTICAL QUESTIONS MCQ
The seeds of which type of plant have no dormancy:-
A.
Xerophytes
B.
Mesophytes
C.
Halophytes and hydrophyte
D.
Mangroves
Q457 Allen ANALYTICAL QUESTIONS MCQ
Identify the correct set of statements with respect to angiosperms:-
(a) A microsporophyll contains stigma, style and ovary
(b) All megaspores produced from megaspore mother cell take part in embryo sac formation.
(c) Hilum is the place where ovule joins with funicle
(d) Basal part of an ovule is represented as micropylar end
(e) Perisperm is present in black pepper.
A.
only c and e are correct
B.
a, b, c and e are correct
C.
c, d and e are correct
D.
only c is correct
Q458 Allen ANALYTICAL QUESTIONS MCQ
Anemophily type of pollination is found in :-
A.
Salvia
B.
Bottle brush
C.
Vallisneria
D.
Coconut
Q459 Allen ANALYTICAL QUESTIONS MCQ
In grass what happens in microspore mother cell for the formation of mature pollen grain:-
A.
One meiotic and two mitotic divisions
B.
One meiotic and one mitotic division
C.
One meiotic division only
D.
One mitotic division only
Q460 Allen ANALYTICAL QUESTIONS MCQ
What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?
A.
16
B.
24
C.
32
D.
8
Q461 Allen ANALYTICAL QUESTIONS MCQ
When a diploid female plant is crossed with a tetraploid male plant, the ploidy of endosperm cells in the resulting seed will be:-
A.
Pentaploid
B.
Diploid
C.
Triploid
D.
Tetraploid
Q462 Allen ANALYTICAL QUESTIONS MCQ
If diploid female plant is crossed with tetra ploid male plant. What would be ploidy level of seed coat: -
A.
3n
B.
n
C.
2n
D.
4n
[
Q463 Allen ANALYTICAL QUESTIONS MCQ
Perispermic and endospermic seeds are found in :-
A.
Castor
B.
Maize
C.
Wheat
D.
Rice
Q464 Allen ANALYTICAL QUESTIONS MCQ
Double fertilization involves: -
A.
Fertilization of the egg by two male gametes
B.
Fertilization of two eggs in the same embryosac by two sperms brought by one pollen tube
C.
Fertilization of the egg and the central cell by two sperms (male gametes) brought by different pollen tubes
D.
Fertilization of the egg and the central cell by two sperms (male gametes) brought by the same pollen tube
Q465 Allen ANALYTICAL QUESTIONS MCQ
The arrangement of the nuclei in a normal embryo sac in the dicot plants is:-
A.
2 + 4 + 2
B.
3 + 2 + 3
C.
2 + 3 + 3
D.
3 + 3 + 2
Q466 Allen ANALYTICAL QUESTIONS MCQ
Which part of the reproductive structure produces both enzyme & hormone :-
A.
Archesporium
B.
Middle layer
C.
Tapetum
D.
Endothecium
Q467 Allen ANALYTICAL QUESTIONS MCQ
Ubisch bodies are produced in :-
A.
Embryosac
B.
Endothecium
C.
Pollen grain
D.
Tapetum
Q468 Allen ANALYTICAL QUESTIONS MCQ
Tapetum is :-
A.
Parietal in origin and is the inner most layer of anther wall.
B.
Modified endothecium of anther wall
C.
Outer most layer of sporogenous tissue modification
D.
Parietal in origin and is the inner most layer of ovule wall
Q469 Allen ANALYTICAL QUESTIONS MCQ
Ubisch bodies are associated with the development of :-
A.
Embryo
B.
Pollen grains
C.
Endosperm
D.
Embryo sac
Q470 Allen ANALYTICAL QUESTIONS MCQ
Identify the correct set of statements for angiosperms:-
(a) Development of angiosperm seed occur inside the ovary / fruit
(b) Typical embryo sac in angiosperms is seven celled and eight nucleated
(c) Free nuclear divisions occur during embryogenesis in angiosperms
(d) Filliform apparatus present in ovule secrets chemicals, which attract pollen tube toward synergids
(e) Development of female gametophyte in typical angiosperms is monosporic. Choose the correct answer from the given options below.
A.
a, d and e
B.
b, d and e
C.
a, b, d and e
D.
b, c, d and e
Q471 Allen ANALYTICAL QUESTIONS MCQ
How many cells or nuclei are present in mature male gametophyte of Capsella :-
A.
One
B.
Two
C.
Three
D.
Many
Q472 Allen ANALYTICAL QUESTIONS MCQ
Which one of the following is resistant to enzyme action?
A.
Pollen exine
B.
Leaf cuticle
C.
Cork
D.
Wood fibre
Q473 Allen ANALYTICAL QUESTIONS MCQ
Pollen tube develops from :-
A.
Generative cell
B.
Male gametes
C.
Vegetative cell
D.
Vegetative nucleus
Q474 Allen 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
Q475 Allen 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