Despite high level of heterozygosity, the progeny derived from a seed of cross pollinated plant was found to be completely uniform. One reason can be ... .... [ BHU 1994 ]
11%
a) Induced mutation
28%
b) Polyploidy
56%
c) Apomixis
6%
d) Parthenocarpy
Q.9.
Cleistogamous flower is found in ... ... [ JKCMEE 2011]
20%
a) Tobacco
10%
b) Mirabilis
50%
c) Viola
20%
d) None of the above
Q.10.
Pollen tube deposits its inclusions in ... ... [ RPMT 1998]
33%
a) Central cell
52%
b) Synergids
5%
c) Oosphere
10%
d) Antipodal cells
Q.11.
In fertilized ovule, n, 2n and 3n conditions occur respectively in ... ... [ BHU 1990]
41%
a) Antipodal, egg and endosperm
59%
b) Egg, nucellus and endosperm
0%
c) Endosperm, nucellus and egg
0%
d) Antipodals, synergids and integuments
Q.12.
Which occurs after double fertilization ... ... [ kerala 2012 ]
5%
a) pollen grain germinates over stigma
0%
b) pollen tube enters the embryo sac
20%
c) Two male gametes are discharged into embryo sac
75%
d) PEN develops into endosperm
Q.13.
In Cucumber, pollen tube enters embryo sac through ... ... [ Manipur 2005 ]
32%
a) Integuments
47%
b) Micropyle
0%
c) Endosperm
21%
d) Chalaza
Q.14.
During formation of pollen grains, a microspore mother cell undergoes ... ... [ CBSE 2001 ]
36%
a) One meiotic division
0%
b) One mitotic division
23%
c) One meiotic and one mitotic division
41%
d) One meiotic and two mitotic divisions
Q.15.
Effect of pollen on character of pericarp and seed coat is ... .. [ AMU 2002 ]
24%
a) Xenia
24%
b) Metaxenia
53%
c) Ruminante endosperm
0%
d) Chimera
Q.16.
Development of sporophyte/embryo from gametophytic tissue without fusion of gametes is .. ... [ Pb PMT2000]
24%
a) Apospory
19%
b) Apogamy
33%
c) Apomixix
24%
d) parthenogenesis
Q.17.
Intraspecific cross pollination is ... ... [ HPPMT 2010 ]
18%
a) Allogamy
18%
b) Geitonogamy
59%
c) Xenogamy
6%
d) Alloautogamy
Q.18.
Movement of pollen tube towards embryo sac is ... ... [ BHU 2002 ]
20%
a) Thermotactic
0%
b) Phototactic
80%
c) Chemotatic
0%
d) Thigmotactic
Q.19.
In angiosperms functional megaspore develops into ... .. [ CBSE mains 2011]
12%
a) Endosperms
76%
b) Embryo sac
0%
c) Ovule
12%
d) Pollen sac
Q.20.
Embryo sac is ... ... [ Bih PMT 2002 ]
5%
a) Microgametophyte
0%
b) Microsporangium
58%
c) Megagametophyte
37%
d) Megasporangium
Q.21.
Ovules of Capsella and Pisum sativum are ... .. [ RPMT 1995 ]
23%
a) Orthotropous
50%
b) Anatropous
5%
c) Amphitropous
23%
d) Campylotropous
Q.22.
Which pair has haploid nature ... ... [ CBSE 2008 ]
11%
a) Nucellus and antipodal cells
22%
b) Egg nucleus and secondary nucleus
28%
c) Megaspore mother cell and antipodal cells
39%
d) Egg cell and antipodal cells
Q.23.
tion 2 What is the fate of the male gametes discharged in the synergid? [NEET 2019]
9%
a) One fuses with egg other(s) degenerate(s) in the synergid.
0%
b) All fuse with the egg.
14%
c) One fuses with the egg, other(s) fuse(s) with synergid nucleus.
77%
d) One fuses with the egg and other fuses with central cell nuclei.
Q.24.
Parthenocarpic fruits are produced by ... ... [ CBSE 2006 ]
12%
a) Treating plants with phenyl mercuric acetate
56%
b) treating plants with low concentration of gibberellic acid and auxin
25%
c) Removing androecium of flowers before release of pollen grains
6%
d) Raising plants from vernalised seeds
Q.25.
Match the columns
a) Zoophily
1) Pollination by birds
b) Ornithophily
2) Pollination by insects
c) Entomophily
3) Pollination by bats
d) Chiropterophily
4) Pollination by animal
18%
a) a - 3, b - 2, c - 1, d - 4
6%
b) a - 1, b - 2, c - 3, d - 4
76%
c) a - 4, b - 1, c - 2, d - 3
0%
d) a - 4, b - 2, c - 3, d - 1
Q.26.
Number of chromosomes is 24 in nucelus. Number of chromosomes in microspore mother cell would be .. .. [ AMU 2001 ]
14%
a) 36
0%
b) 30
50%
c) 24
36%
d) 12
Q.27.
Genotypically the pollen grains produced an anther belong to ... ... [ CPMT 1991]
24%
a) One type
18%
b) Two types
29%
c) Many types
29%
d) All the above
Q.28.
Function of guiding and attracting pollen tube is done by ... ... [ AFMC 2002 ]
6%
a) Egg cell
88%
b) Filiform apparatus
0%
c) Antipodal cells
6%
d) Secondary nucleus
Q.29.
In double fertilization, male gamete and secondary nucleus form ... ... [ AFMC 1999 ]
Assertion: In some species of asteraceae and poaceae, seeds are formed without fertilization Reason: Formation of fruit without fertilization is called parthenocarpy ... ... [ AIIMS 2011]
50%
a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
29%
b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
14%
c) Assertion is true but, Reason is false
7%
d) Assertion is false but, Reason is true
Q.32.
What is wrong ... ... [ DPMT 2011]
26%
a) Pollen grains remain viable for several months because of sporopollenin covering
11%
b) No enzyme can degrade sporopollenin
16%
c) Pollen grains are well represented in fossil strata due to sporopollenin
47%
d) Pollen wall has cavities containing proteins
Q.33.
Suspensor of embryo is formed by ... ... [ MHTCET 2008 ]
36%
a) Basal cell
14%
b) Apical cell
14%
c) Terminal cell
36%
d) Hypophysis
Q.34.
In angiosperms, endosperm is formed by .... ....
12%
a) Division of fused polar nuclei
35%
b) Free nuclear division of megaspore
18%
c) Division of fused synergids and male gamete
35%
d) Division of fused polar nuclei and male
Q.35.
Female gamete of angiosperms is represented by ... .. [ AMU 1998]
12%
a) Oospore
47%
b) Carpel
29%
c) Egg
12%
d) Pollen grain
Q.36.
Maturation of anthers and stigma at the same time is ... ... [ JIPMER 2000 ]
12%
a) Allogamy
6%
b) Xenogamy
69%
c) Homogamy
12%
d) Dichogamy
Q.37.
Embryo sac occurs in ... ... [ CBSE 1991 ]
17%
a) Embryo
22%
b) Axis part of embryo
56%
c) Ovule
6%
d) Endosperm
Q.38.
Fibrous thickenings of hygroscopic nature are found in this part of anther ... .. [ EAMCET 2005 ]
12%
a) Epidermis
19%
b) Tapetum
12%
c) Middle layer
56%
d) Endothecium
Q.39.
Chromosome number in oosphere isThe number in angiospermic endosperm shall be ... ... [ CPMT 1994 ]
31%
a) 8
8%
b) 12
15%
c) 16
46%
d) 24
Q.40.
Which is not true ... ...
18%
a) Pollen grain are released from anthers at 2-celled stage
41%
b) Sporogenous cell directly behave as megaspore mother cell
29%
c) Megaspore divides twice to form an 8-nucleate embryo sac
12%
d) Endosperm is triploid
Q.41.
In mesogamy, pollen tube enters the ovule through ... ... [ Manipla 1997 ]
54%
a) Middle of integuments after piercing the tissues
8%
b) Middle of integuments without piercing the tissues
0%
c) Chalaza
38%
d) Middle of micropyle
Q.42.
Ovule is inverted with body fused to funicle, micropyle laying close to hilum and facing the placenta. It is ... ... [ BHU 1998 ]
7%
a) Hemitropous
13%
b) Orthotropous
53%
c) Anatropous
27%
d) Campylotropous
Q.43.
Nucellae embryo is .. .. [ CBSE 1989]
25%
a) Amphimictic haploid
17%
b) Amphimictic diploid
17%
c) Apomictic haploid
42%
d) Apomictic diploid
Q.44.
For self pollination, a flower should be ... ... [ Har PMT 2005 ]
0%
a) Asexual
0%
b) Monosexual
19%
c) Unisexual
81%
d) Bisexual
Q.45.
Fore-runner of male gamete is ... ... [ MHTCET 2010 ]
38%
a) Megasporangium
8%
b) Antipodal cell
46%
c) Microspore mother cell
8%
d) Embryo sac
Q.46.
Pollenkitt is formed from ... ... [ CPMT 2001 ]
21%
a) Endothecium
7%
b) Middle layers
21%
c) Microspore mother cell
50%
d) Tapetum
Q.47.
Fusion of one male gamete with egg and other of the same pollen tube with two polar nuclei is ... ... [ AIIMS 2005 ]
27%
a) Triple fusion
7%
b) Vegetative fertilization
67%
c) Double fertilization
0%
d) parthenogenesis
Q.48.
Vegetative fertilization, which involves formation of endosperm, is fusion of ... ... [ JKCMEE 2003 ]
79%
a) One male gamete with diploid secondary nucleus
0%
b) Two vegetative cells
0%
c) Two male gametes
21%
d) Female gamete with secondary nucleus
Q.49.
Polar nuclei are located in ... .. [ CPMT 1994]
27%
a) Pollen tube
60%
b) Embryo sac
7%
c) Ovule
7%
d) Thalamus
Q.50.
Plants with one or a few ovules are generally pollinated by [ CBSE 2012 ]
53%
a) Wind
33%
b) Bees
7%
c) Birds
7%
d) Butterflies
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