Q. No.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
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
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 points is incorrect about sporopollenin?
(1) It is one of the most resistant organic material known
(2) It can withstand high temperature and strong acids and alkali
(3) 2 enzymes that degrade sporopollenin are known so far
(4) Pollen grains are well preserved as fossils because of presence of sporopollenin
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
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