Select Question Set:
Q. No.Which of the following statements about pollen grains is incorrect?
1.
Pollen grains are part of the male gametophytes in flowering plants.
2.
Each pollen grain contains two cells: the vegetative cell and the generative cell.
3.
The outer wall of the pollen grain is called the exine, which is known for its high resistance to decay.
4.
Pollen grains are formed in the megasporangium of the flower.
Subtopic: Stamen: Microsporangium |
93%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Consider the given two statements:
| Assertion (A): | The endosperm is formed before fertilization in most flowering plants. |
| Reason (R): | The endosperm serves as a nutritional source for the developing embryo. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True, (R) is False. |
| 4. | (A) is False, (R) is True. |
Subtopic: Endosperm |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
What is unique about the pollen exine?
| 1. | It is made of cellulose and is highly permeable. |
| 2. | It is made of sporopollenin, which is extremely resistant to harsh environmental conditions and enzymes. |
| 3. | It is soft and easily degradable to facilitate germination. |
| 4. | It contains chlorophyll to aid in photosynthesis. |
Subtopic: Stamen: Male Gametophyte |
97%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Which statement about the viability of pollen grains is correct?
| 1. | Pollen grains are viable for several weeks after release. |
| 2. | Pollen grains lose their viability within 30 minutes of release. |
| 3. | The viability of pollen grains varies among species, ranging from a few minutes to several months. |
| 4. | All pollen grains remain viable indefinitely when stored at room temperature. |
Subtopic: Stamen: Male Gametophyte |
90%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Perisperm differs from endosperm in that:
| 1. | Perisperm is derived from the fertilization of the central cell, while endosperm is not. |
| 2. | Perisperm is a diploid tissue, while endosperm is tetraploid. |
| 3. | Endosperm is derived from the fertilization of the central cell, while perisperm is not. |
| 4. | Endosperm is a diploid tissue, while perisperm is triploid. |
Subtopic: Seed |
87%
Please attempt this question first.
Hints
Consider the given two statements:
| Assertion (A): | Wind-pollinated plants often have long and feathery stigmas. |
| Reason (R): | The large surface area of feathery stigmas increases the chance of catching pollen grains from the air. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Pollination & Outbreeding Devices |
97%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The layers in the wall of a microsporangium, from the outermost to the innermost, are:
| 1. | Epidermis, endothecium, middle layers, tapetum |
| 2. | Tapetum, middle layers, endothecium, epidermis |
| 3. | Endothecium, epidermis, tapetum, middle layers |
| 4. | Middle layers, tapetum, endothecium, epidermis |
Subtopic: Stamen: Microsporangium |
97%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Match the following structures with their functions during the reproduction in flowering plants:
Codes:
| Column I | Column II | ||
| A | Pollen Tube | P | Feeds the developing embryo |
| B | Stigma | Q | Site of pollen grain landing |
| C | Endosperm | R | Allows the sperm to reach the ovule |
| D | Micropyle | S | Entry point for pollen tube into ovule |
| A | B | C | D | |
| 1. | S | Q | R | P |
| 2. | R | Q | P | S |
| 3. | P | R | Q | S |
| 4. | Q | P | S | R |
Subtopic: Stamen: Male Gametophyte | Pistil: Ovule |
95%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
What will be the ploidy of the endosperm in an angiosperm produced as a result of a cross between a tetraploid female plant and a diploid male plant?
1. Triploid
2. Tetraploid
3. Pentaploid
4. Hexaploid
1. Triploid
2. Tetraploid
3. Pentaploid
4. Hexaploid
Subtopic: Post Pollination Events | Double Fertilization | Endosperm |
61%
Please attempt this question first.
Hints
Long, ribbon-like pollen grains are characteristically seen in some:
1. aquatic plants
2. bird-pollinated grasses
3. gymnosperms
4. wind-pollinated flowers
1. aquatic plants
2. bird-pollinated grasses
3. gymnosperms
4. wind-pollinated flowers
Subtopic: Pollination & Outbreeding Devices |
78%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Select Question Set:
© 2025 GoodEd Technologies Pvt. Ltd.