Post Video Test-Sexual Reproduction in Flowering PlantsContact Number: 8527521718Post Video Test-Sexual Reproduction in Flowering PlantsContact Number: 8527521718Which of the following statement is not associated with phenomenon of flowering?
1. Decision for flowering takes place much before actual flower appears.
2. During flowering several structural and hormonal changes takes place.
3. During flowering differentiation takes place.
4. Flowering is independent of environmental factors.
A typical angiosperm anther is bilobed with each lobe having two theca i.e. dithecous. Theca is separated often by :
1. A longitudinal groove running lengthwise.
2. A longitudinal groove running breadth wise.
3. A transverse groove running breadth wise.
4. A transverse groove running lengthwise.
Read the statements and select option representing correct statements with respect to stamen.
A. The distal end of filament is attached to thalamus.
B. A typical anther is dithecous and bisporangiate.
C. Connective is sterile vasculated tissue.
D. Microsporangia develop further and become pollen sacs.
1. A & B
2. A & C
3. B & C
4. C & D
Outer three layers of anther wall perform the function of
(1) Nourishment
(2) Protection
(3) Dehiscence
(4) Both 2 & 3
Entry of pollen tube through integument is_____and found in______
(1) Chalazogamy, Casuarina
(2) Porogamy, Lily
(3) Mesogamy, Cucubits
(4) Acrogamy, Ulricularia
The genetic mechanism that prevents self pollen (from the same flower or other flowers of the same plant) from fertilising the ovules by inhibiting pollen germination or pollen tube growth in the pistil, called as
(1) Dioecy
(2) Dichogamy
(3) Monocliny
(4) Self incompatibility
What will be the total number of meiosis and mitosis division generations for 5 typical embryo sac formation respectively from megaspore mother cells?
Plants pollinated by wind do not show
(1) Light and non-sticky pollen grains
(2) Well-exposed stamens
(3) Large-sized flowers
(4) Presence of single ovule in each ovary
Genetically and functionally self-pollination is cent percent ensured with seed formation even in the absence of pollinators by
(1) Bisexuality
(2) Dicliny
(3) Geitonogamy
(4) Cleistogamy
Polygonum type embryo sac is
(1) Monosporic
(2) Seven celled with one largest binucleate cell
(3) Eight nucleated with 3 + 2 + 3 arrangement
(4) All are correct
Ovule generally differentiate a single _____ in the ______ region of the nucellus.
(1) Megaspore mother cell, micropylar
(2) Megaspore, micropylar
(3) Megaspore, mother cell, chalazal
(4) Primary
How many statement(s) is/are correct for pollen grains?
a. Parthenium is a cause of bronhial afflictions
b. Intine exhibits fascinating array of patterns and designs
c. Cytoplasm of pollen grain is s urrounded by spermoderm
d. Generative cell is present when pollens are shed in 40 percent plants.
1. One
2. Two
3. Three
4. Four
Fossilization of pollen grains is helped by
(1) Compatible protein
(2) Sporopollenin
(3) Cellulose
(4) Pectin
The largest cell of embryo sac is
(1) Antipodal
(2) Synergid
(3) Central cell
(4) Egg
Read the statements carefully and select correct option.
A. Pollen grains of carrot grass cause bronchial afflictions
B. Pollen viability is maximum in wheat
C. Pollen grains are well preserved as, fossils due to pecto-cellulose
D. Pollen grain aperture is devoid of sporopollenin.
1. A and D 2. A and B
3. B and C 4. A, B and D
Which of the following statements for generative cell is incorrect?
(1) Floats in the cytoplasm of vegetative cell
(2) Has abundant food reserve
(3) Spindle-shaped
(4) Dense cytoplasm with a nucleus
Pollen grains are released from anther in 60% of angiosperms
A. With male gametes
B. After first mitosis
C. At two-celled stage
D. After second mitosis
Mark the correct option
1. B and C 2. A and D
3. A and B 4. A and C
How many of the given options are correct?
Column I Column II
a. Pollen kitt Sticky pollen
b. Callase enzyme Secreted by endothecium
c. Polyploid layer of anther wall Tapetum
d. Pollen allergy Parthenium
1. Two 2. Three
3. Four 4. One
Gynoecium of Michelia and Papaver is similar in being
(1) Apocarpous
(2) Syncarpous
(3) Monocarpellary
(4) Polycarpellary
Flowers of which of the following plants should be pollinated within half an hour for successful seed formation after anther dehiscence?
(1) Pea
(2) Potato
(3) Rice
(4) Bean
Find incorrect statement:
| 1. | A polycarpellary, apocarpous gynoecium is found in Michelia |
| 2. | Many ovules are present in an ovary of papaya and orchids |
| 3. | Yellowish, powdery pollen grains found in Hibiscus |
| 4. | The more pistils may be fused together to form monocarpellary syncarpous gynoecium |
Match the column with respect to pollen grain:
|
Column I |
Column II |
||
|
a) |
Vegetative Cell Nucleus |
(i) |
Abundant Reserve Food & Irregular Nucleus |
|
b) |
Germ Pore |
(ii) |
Spindle shaped with dense cytoplasm |
|
c) |
Exine |
(iii) |
Where the Sporopollenin is absent |
|
(iv) |
Variable Pattern & design |
||
|
(v) |
Continuous layer made up of Cellulose & pectin |
1. a(iv), b(v), c(iii)
2. a(i), b(iii), c(v)
3. a(i), b(iii), c(iv)
4. a(iv), b(i), c(iii)
Tapetum is:
1. Group of compactly arranged polyploidy cells in centre of anther
2. Innermost wall layer which nourishes megaspore mother cells
3. The cells with more nucleus that do not help in dehiscence
4. Protecting, multilayered, cells with dense cytoplasm in surrounding of sporogenous mass
Which of the following statement is not associated with phenomenon of flowering?
(1) Decision for flowering takes place much before actual flower appears.
(2) During flowering several structural and hormonal changes takes place
(3) During flowering differentiation takes place
(4) Flowering is independent of environmental factors
A typical angiosperm anther is bilobed with each lobe having two theca i.e. dithecous. Theca is separated often by:
(1) A longitudinal groove running lengthwise
(2) A longitudinal groove running breadth wise
(3) A transverse groove running breadth wise
(4) A transverse groove running lengthwise
Following are four statements how many of them are correct?
a. The anther is a tetragonal structure, with four microsporangia at corners, two in each lobe.
b. Microsporangia develops further and becomes pollen sacs.
c. A typical microsporangia is surrounded by four-layered wall, 3-protective and 1 nutritional.
d. The nutritive layer is densely cytoplasmic and with more than one nucleus
Options :
1. 3 2. 4
3. 2 4. 1
When anther is young a group of compactly arranged homogenous cells are present in centre it is known as
(1) Sporogenous tissue
(2) Potential pollen mother cell
(3) Both 1 and 2
(4) Conjunctive tissue
Which of the following structure is not associated with protection and dehiscence of anther?
Which of the following statement is not correct for pollen grain?
(1) It represents male gametophyte
(2) It is a spherical structure, about 25-50 micron in diameter
(3) Pollen grains are rich in nutrients
(4) In family rosaceae, leguminoseae and solanaceae pollen lose viability in 30 minute
In which of the following plant there will be no seed set even after pollination?
(1) Plant with monoecious flower
(2) Dioecious plant with staminate flowers
(3) Dioecious plant with pistillate flowers
(4) This statement is not true
Arrange the following stages of microspore development into pollen grain, in the correct sequence
1. b, c, d, and a
2. b, d, a and c
3. a, c, b and d
4. b, a, d and c
How many meiotic divisions are required to produce 480 seeds?
1. 479
2. 600
3. 70
4. 650
Identify the statements that are true for anemophilous flowers
a. Pollen grains are light and non-sticky.
b. They possess well exposed stamens.
c. They have large coloured flowers.
d. They have single ovule in each ovary.
e. Flowers produce nectar and scent.
1. a, b and e
2. a, b and d
3. b, c and e
4. c, d and e
Both chasmogamous and cleistogamous flowers, are produced by
1. Pea and Zostera.
2. Bean and Vallisneria.
3. Maize and bamboo.
4. Oxalis and Commelina.
Choose the incorrect statement with respect to pollen grain
1. Exine of the pollen grain has prominent apertures called germ pores where sporopollenin is absent.
2. Inner wall of the pollen grain is called intine.
3. Pollen grains are generally spherical in shape.
4. In 60 percent of angiosperms, pollen is shed at three-called stage.
Choose the correct statements
a. Perisperm is the persistant nucellus in the seeds of black pepper.
b. Single large cotyledon in grass is situated towards lateral side of the embryonal axis.
c. Seeds are the basis of agriculture.
d. Citrus has only one embryo in a seed.
1. Only a
2. Only a & b
3. Only a, b & c
4. a, b, c & d
From the statements given below choose the option that are not true for a typical female gametophyte of a flowering plant:
(i) It is 8-nucleate and 7-celled at maturity
(ii) It is cellular during the development
(iii) It is situated inside the nucellus
(iv) It has an egg apparatus situated at the chalazal end
1. i and iv
2. ii and iii
3. i and ii
4. ii and iv
The mature seeds of plants such as gram and peas, posses no endosperm, because
1. These plants are not angiosperms
2. There is no double fertilization in them
3. Endosperm is not formed in them
4. Endosperm gets used up by the developing embryo during seed development
Match the following and choose correct option
Group A Group B
A. Aleurone layer i. without fertilization
B. Parthenocarpic fruit ii. Nutrition fruit
C. Ovule iii. Double fertilization
D. Endosperm iv. Seed
1. A-i, B-ii, C-iii, D-iv
2. A-ii, B-i, C-iv, D-iii
3. A-iv, B-ii, C-i, D-iii
4. A-ii, B-iv, C-i, D-iii
Following are four statements find out correct statements
(i) Microsporangia has four layers, outer three are protective and inner one is nutritive
(ii) Each cell of sporogenous tissue within micorsporangia is capable of giving raise to a microspore tetrad.
(iii) Dehydration of anther is important for seperation of pollen grains in a tetrad.
(iv) Generative cell in pollen grain is small with respect to vegetative cell and it floats in cytoplasm of vegetative cell.
Options
1. All are correct
2. Only (i), (ii) and (iii) is correct
3. Except (ii) all are correct
4. Expect (iii) all are correct.
