Sexual Reproduction In Flowering Plants
307 Questions
Start Errorless Test
MP PMT 1993, 94; CBSE PMT 1998; 2000; CPMT 2001; RPMT 2006
Q226
Errorless
5. Embryo and endosperm
MCQ
In angiosperms endosperm is formed by
A.
Free nuclear divisions of megaspore
B.
Division of fused polar nuclei
C.
Division of fused polar nuclei and male gamete
D.
Division of fused synergids and male gamete
CBSE PMT 1993; MP PMT 2003
Q227
Errorless
5. Embryo and endosperm
MCQ
In agamospermy, the embryo sac is diploid because it is formed without meiosis. Such embryo sac may develop from
A.
Megaspore mother cell
B.
Microspore mother cell
C.
Megaspores
D.
Microspores
CBSE PMT 1993; MH CET 2015
Q228
Errorless
5. Embryo and endosperm
MCQ
In angiosperms, the oospore on development produces
A.
Seed
B.
Embryo
C.
Protonema
D.
Endosperm
CPMT 1993, 97, 98, 2009; MP PMT 1994; KCET 2000; Kerala CET 2002; AMU (Med.) 2005; HPMT 2005; RPMT 2006
Q229
Errorless
6. Parthenocarpy
MCQ
Formation of fruits (Seed) without fertilization is known as or Ovary No fertilization ā Fruit [NCERT Pg. No. 21]
Or
The process of embryo formation without fertilisation is known as [J & K CET 2008]
A.
Parthenocarpy
B.
Parthenogenesis
C.
Polyembryony (d)Polygamy
CBSE PMT 1993
Q230
Errorless
8. Critical Thinking
MCQ
Which of the following statements is correct for the pollen tube
A.
It shows chemotactic movement
B.
It shows only tip growth
C.
It is composed of three non-cellular zones
D.
It shows radial cytoplasmic streaming
JIPMER 1993
Q231
Errorless
8. Critical Thinking
MCQ
Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube because
A.
Laser beam stimulates pollen germination and pollen tube growth
B.
The laser beam does not damage the region from which pollen tube emerges
C.
The contents of killed generative cell permit germination and pollen tube growth
D.
The vegetative cell has not been damaged
AFMC 1993
Q232
Errorless
8. Critical Thinking
MCQ
Sperm cells of angiosperms differ from the rest of the plant groups like gymnosperms by
A.
In angiosperms the sperm cells are non-motile whereas in the others they are flagellate
B.
In angiosperms the sperm cells are produced in the pollen grain whereas in the rest they are produced in the antheridium
C.
In angiosperms and gymnosperms the sperm cells are non-motile whereas in the rest they are flagellated
D.
None of the above
AIIMS 1993
Q233
Errorless
8. Critical Thinking
MCQ
When the pollen grains are not transferred from anthers to the stigma in flower due to the barrier or fence, it is referred or when some natural barrier exists between androecium and gynoecium to check self pollination, it is known as
A.
Heterostyly
B.
Herkogamy
C.
Dichogamy
D.
Cleistogamy
DPMT 1993
Q234
Errorless
8. Critical Thinking
MCQ
Which is the most logical sequence with reference to the life cycle of angiosperms
A.
Germination, endosperm formation, seed dispersal, double fertilization
B.
Pollination, fertilization, seed formation, germination
C.
Cleavage, fertilization, grafting, fruit formation
D.
Maturation, mitosis, differentiation, fertilization
DPMT 1992; KCET 2012
Q235
Errorless
3. Pollination
MCQ
Match the entries in Column I with those of Column Il and choose the correct answer
| Column-I | Column-II | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
A.
A-S; B-R; C-Q; D-P
B.
A-R; B-Q; C-S; D-P
C.
A-S; B-P; C-R; D-Q
D.
A-Q; B-P; C-S; D-R
AIIMS 1992; MP PMT 2004
Q236
Errorless
3. Pollination
MCQ
Part of the gynoecium which receives the pollen is called
A.
Ovary
B.
Ovule
C.
Style
D.
Stigma
Bihar CECE 1992
Q237
Errorless
5. Embryo and endosperm
MCQ
If the number of chromosomes in endosperm of a dicot plant is 36, the root cells will contain
A.
72 chromosomes
B.
28 chromosomes
C.
24 chromosomes
D.
48 chromosomes
CBSE PMT 1991; Odisha JEE 2011
Q238
Errorless
1. Microsporogenesis
MCQ
The odd one is
A.
Micropyle
B.
Embryo sac
C.
Nucellus
D.
Pollen grain
CBSE PMT 1991, 2008
Q239
Errorless
2. Megasporogenesis
MCQ
Which one of the following pairs of plant structures has haploid number of chromosomes
A.
Nucellus and antipodal cells
B.
Egg nucleus and secondary nucleus
C.
Megaspore mother cell and antipodal cells
D.
Egg cell and antipodal cells
CBSE PMT 1991; MP PMT 1995
Q240
Errorless
4. Fertilization
MCQ
The process of fusion between male nucleus and egg nucleus is called as
A.
Syngamy
B.
Triple fusion
C.
Double fertilization
D.
Conjugation
CBSE PMT 1991; CPMT 1994. 95; MP PMT 1997; BHU 1999; AIIMS 2005; AFMC 2006; AMU (Med.) 2010; WB JEE 2016
Q241
Errorless
8. Critical Thinking
MCQ
Double fertilization process means
A.
Fusion of one male gamete nucleus with egg nucleus while fusion of other male gamete nucleus with secondary nucleus
B.
Fusion of male gamete nucleus with secondary nucleus
C.
Fusion of two polar nuclei with each other
D.
Fusion of male gamete nucleus with egg nucleus
CBSE PMT 1990
Q242
Errorless
1. Microsporogenesis
MCQ
In anther culture, the androgenic haploid plants are obtained from
A.
Young pollen grain
B.
Connective tissue
C.
Anther tapetum
D.
Anther wall
CBSE PMT 1990
Q243
Errorless
1. Microsporogenesis
MCQ
In monocots, male gametophyte is
A.
Microspore
B.
Megaspore
C.
Tetrad
D.
Nucellus
CBSE PMT 1990; Pb. PMT 1999; MP PMT 2010; CPMT 2010
Q244
Errorless
2. Megasporogenesis
MCQ
Embryo sac is
A.
Megasporangium
B.
Megaspore
C.
Female gametophyte
D.
Female gamete
CBSE PMT 1990; AFMC 1993; MH CET 2006
Q245
Errorless
2. Megasporogenesis
MCQ
Tegmen develops from
A.
Outer integument
B.
Inner integument
C.
Chalaza
D.
Funicle
CBSE PMT 1990
Q246
Errorless
4. Fertilization
MCQ
The nuclei of the sperm and egg fuse as a result of
A.
Base pair relation of DNA and RNA
B.
Formation of hydrogen bonds
C.
Mutual attraction caused by differences in electrical charges
D.
Attraction of protoplasts of egg and sperm
1960
Q247
Errorless
1. Microsporogenesis
MCQ
The given figure refers to a T.S. of anther. Identify A to E respectively
A.
Sporogenous tissue, tapetum, middle layer, epidermis, endothecium
B.
Sporogenous tissue, epidermis, middle layer, tapetum, endothecium
C.
Sporogenous tissue, epidermis, tapetum, middle layer, endothecium
D.
Sporogenous tissue, tapetum, epidermis, middle layer, endothecium
ubd 1960
840 Sexual Reproduction in Flowering Plants
ubd 1960
840 Sexual Reproduction in Flowering Plants
Q248
Errorless
1. Microsporogenesis
MCQ
Which one of the following statements is not true
A.
Tapetum helps in the dehiscence of anther
B.
Exine of pollen grains is made up of sporopollenin
C.
Pollen grains of many species cause severe allergies
D.
Stored pollen in liquid nitrogen can be used in the crop breeding programmes
Q249
Errorless
1. Microsporogenesis
MCQ
The given figure represents some stages in microgametogenesis. Identify A, B and C respectively
A.
Symmetric spindle Vegetative cellGenerative cell
B.
Symmetric spindle Generative cell Vegetative cell
C.
Asymmetric spindle Vegetative cell Generative cell
D.
Asymmetric spindle Generative cellVegetative cell
Q250
Errorless
1. Microsporogenesis
MCQ
The given figure is an enlarged view of one microsporangium of a matured anther. identify A, B and C Epidermis
A.
A - Endothecium, B - Tapetum, C - Middle layer
B.
A - Middle layer, B - Endothecium, C - Tapetum
C.
A - Tapetum, B - Middle layer, C - Endothecium
D.
A - Endothecium, B - Middle layer, C - Tapetum