1. Match the following:
1 |
Male gametophyte |
I |
Embryo sac |
2 |
Female gametophyte |
II |
Ovule |
3 |
Megasporangium |
III |
Pollen grains |
4 |
Microsporangium |
IV |
Pollen sacs |
(1) 1-III ; 2-I ; 3-II ; 4-IV
(2) 1-I ; 2-II ; 3-III ; 4-IV
(3) 1-IV ; 2-III ; 3-II ; 4-I
(4) 1-III ; 2-II ; 3-I ; 4-IV
2. Which among the following is not a characteristic feature of sporopollenin?
(1) Sporopollenin is one of the most resistant organic material known.
(2) It can withstand high pressures.
(3) No enzyme that degrades sporopollenin is known.
(4) The exine exhibits a fascinating array of patterns and designs.
3.
The above diagram shows some stages in microgametogenesis. Identify A, Band C:
A B C
(1) Symmetric spindle Generative cell Vegetative cell
(2) Symmetric spindle Vegetative cell Generative cell
(3) Asymmetric spindle Vegetative cell Generative cell
(4) Asymmetric spindle Generative cell Vegetative cell
4. 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
5. 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
6. 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
7. Filiform apparatus is a characteristic feature of?
1. Generative cell
2. nucellar embryo
3. aleurone cell
4. synergids
8. Which one of the following statements is wrong?
1. |
When pollen is shed at two-celled stage, double fertilization does not take place. |
2. |
Vegetative cell is larger than generative cell. |
3. |
Pollen grains in some plants remain viable for months. |
4. |
Intine is made up of cellulose and pectin. |
9. Tapetum :
I. |
Is a layer of nutritive cells that are found within the microsporangium. |
II. |
The cells are usually bigger and normally have more than one nucleus per cell
because mitosis is not normal in them. |
III. |
Helps in pollen wall formation, transportation of nutrients to the inner side of the anther, synthesis of callose enzyme for separation of microspore tetrads. |
Of the above statements, the correct ones are:
1. |
I and II only |
2. |
I and III only |
3. |
II and III only |
4. |
I, II, and III |
10. Pollen grains lose viability within 30 minutes of their release in some members of:
1. | Rosaceae | 2. | Leguminosae |
3. | Poaceae | 4. | Solanaceae
|
11. Most abundant/common type of pollen tetrad is _________ and it is formed due to _________ cytokinesis.
1. Tetrahedral, successive
2. Tetrahedral, simultaneous
3. Isobilateral, successive
4. Isobilateral, simultaneous
12. Pollen grain in angiosperms
1. Is derived from a megaspore
2. Remains permanently embedded in the nucellus
3. Is generally shed in 2-celled stage
4. Is 7-celled and 8 nucleated structure
13. Find out the correct order (with respect to development of male gametophyte)
1. '
2.
3.
4.
14. In pollen banks, pollens are stored at
1. of liquid nitrogen
2. of liquid nitrogen
3. of liquid nitrogen
4. of liquid nitrogen
15. Which is correct to gametophyte in angiosperm?
Gametophyte Male Female
Gametophyte Gametophyte
1. Dioecious 3 nucleated 8 nucleated
2. Monoecious 3 nucleated 8 nucleated
3. Trioecious 3nucleated 8 nucleated
4. Bisexual 2 nucleated 7 nucleated
16.
Assertion (A): |
No enzyme that degrades sporopollenin is so far known. |
Reason (R): |
It is one of the most resistant organic material of megaspore. |
1. |
Both (A) and (R) are True and (R) is the correct explanation of (A) |
2. |
Both (A) and (R) are True and (R) is not the correct explanation of (A) |
3. |
(A) is True, (R) is False |
4. |
(A) is False and (R) is False |
17.
Assertion (A) : |
Pollen grains can be stored for years at 196 ° C temperature. |
Reason (R) : |
Stored pollens can be used as seed banks. |
1. |
Both (A) and (R) are true and (R) is the correct explanation of (A) |
2. |
Both (A) and (R) are true and (R) is not the correct explanation of (A) |
3. |
(A) is true, (R) is false |
4. |
(A) is false and (R) is false |
18. Which of the following is incorrect regarding pollen grains in angiosperms?
1. |
The exine is made up of sporopollenin. |
2. |
Generative cell divides meiotically to give rise to four gametes. |
3. |
In over 60% of angiosperms, pollen grains are shed at the 2-celled stage. |
4. |
Pollen grains of many species can cause severe allergies in humans. |
19. Parthenium or carrot grass came to India as a contaminant with:
(1) Wheat
(2) Maize
(3) Dwarf rice
(4) Eucalyptus
20. The thin and continuous wall layer of pollen is
(1) Exine
(2) Intine
(3) Germ pore
(4) Endothecium
21. Identify the incorrect statement:
1. |
Pollen sacs are developed microsporangia |
2. |
Pollen grains are developed microspores |
3. |
Vegetative cell of the pollen grain is bigger than the generative cell |
4. |
In over 60 percent of angiosperms pollens are shed at 3-celled stage |
22. Regarding pollen grains:
I. |
Exine is made up of sporopollenin |
II. |
Generative cell is bigger than the vegetative cell |
III. |
Generative cell divides meiotically to produce male gametes |
1. Only
I is correct
2. Only
I and
III are correct
3. Only
II is correct
4.
I,
II and
III are correct
23. Plants do not contain many parts that can be easily fossilized. Which of the following has proved helpful in preserving pollens as fossils?
1. Pollenkit
2. Cellulosic intine
3. Callose in pollen tetrad
4. Sporopollenin
24. The generative cell of male angiosperm gametophytes is haploid. This cell divides to produce two haploid sperm cells. What type of cell division does the generative cell undergo to produce these sperm cells?
1. binary fission
2. mitosis
3. meiosis
4. mitosis without subsequent cytokinesis
25. Which of the following is the correct sequence of events in a pollen sac?
1. |
sporangia → meiosis → two haploid cells → meiosis → two pollen grains per cell
|
2. |
pollen grain → meiosis → two generative cells → two tube cells per pollen grain
|
3. |
two haploid cells → meiosis → generative cell → tube cell-fertilization → pollen grain
|
4. |
microsporocyte → meiosis → microspores → mitosis → two haploid cells per pollen grain |
26. Regarding the given diagram:
Statement I: |
It shows a pollen tetrad. |
Statement II: |
The four microspores are contained by callose walls. |
1. |
Statement I is correct, Statement II is correct. |
2. |
Statement I is incorrect, Statement II is correct. |
3. |
Statement I is correct, Statement II is incorrect. |
4. |
Statement I is incorrect, Statement II is incorrect. |
27. Match each item in Column I with one in Column II and select the correct match from the codes given:
|
Column I |
|
Column II |
A |
Pollen grains shed at 2-celled stage |
P |
In about 60 per cent of angiosperms |
B |
Pollen grains shed at 3-celled stage |
Q |
In about 40 per cent of angiosperms |
C |
Pollen intine |
R |
Made up of sporopollenin |
D |
Pollen exine |
S |
Made up of cellulose and pectin |
Codes:
|
A |
B |
C |
D |
1. |
Q |
P |
R |
S |
2. |
Q |
P |
S |
R |
3. |
P |
Q |
S |
R |
4. |
P |
Q |
R |
S |
28. Read the following statements and select the correct option.
l. Each cell of sporogenous tissue in anther is capable of giving rise to microspore tetrad.
ll. The pollen grain represents the male gametophyte.
lll. Pollen grains are usually triangular and 10-15 µm in diameter.
lv. Sporopollenin is one of the most resistance organic material which can be destroyed only by strong acids and
alkali.
1. l, II are incorrect but Ill, IV are correct
2. lll, IV are incorrect but I, II are correct
3. I, Ill are incorrect but ll, IV are correct
4. II, IV are correct but I, Ill are incorrect
29. Consider the given two statements:
Statement I: |
Cryopreservation or cryoconservation is a process where biological material - cells, tissues, or organs - are frozen to preserve the material for an extended period of time. |
Statement II: |
It is not possible to store pollen grains of angiosperms by cryopreservation. |
1. |
Statement I is correct; Statement II is correct |
2. |
Statement I is incorrect; Statement II is correct |
3. |
Statement I is correct; Statement II is incorrect |
4. |
Statement I is incorrect; Statement II is incorrect |
30. Consider the given two statements:
Assertion: |
Pollen grain exine has prominent apertures called germ pores where sporopollenin is absent. |
Reason: |
Germ pore is the structure through which the germ tube or pollen tube makes its exit on germination. |
1. |
Both Assertion and Reason are true but the Reason does not correctly explain the Assertion. |
2. |
Assertion is true but Reason is false. |
3. |
Both Assertion and Reason are true and the Reason correctly explains the Assertion. |
4. |
Assertion is false but Reason is true. |
31.
Assertion: |
In angiosperms, the male gametophyte contains a single male gamete that unites with the egg to produce the seed. |
Reason: |
The embryosac in angiosperms has an egg apparatus that consist of only one egg cell. |
1. |
Both Assertion and Reason are true but the Reason does not correctly explain the Assertion. |
2. |
Assertion is true but Reason is false. |
3. |
Both Assertion and Reason are true and the Reason correctly explains the Assertion. |
4. |
Assertion is false but Reason is true. |
32. Pollen grains:
I: |
of carrot grass causes severe allergies and bronchial afflictions in some people often leading to chronic respiratory disorders– asthma, bronchitis, etc. |
II: |
are rich in nutrients. |
III: |
maintain viability for many months in cereals such as rice and wheat. |
IV: |
unlike seeds cannot be preserved in liquid nitrogen (-196°C). |
1. Only
I and
II are correct
2. Only
III and
IV are correct
3. Only
I and
III are correct
4. Only
II and
IV are correct
33. Cryopreservation is a technique that involves storing biological material in liquid nitrogen at:
1. 0°C
2. - 4°C
3. -100°C
4. -196°C
34. Parthenium or carrot grass, an invasive species, came into India as a contaminant with imported:
1. |
Rice |
2. |
Wheat |
3. |
Maize |
4. |
Cotton |
*If above link doesn't work, please go to test link from where you got the pdf and fill OMR from there
CLICK HERE to get FREE ACCESS for 2 days of ANY NEETprep course