Q. No.The only type of pollination which during pollination brings a genetically different type of pollen grains to the stigma is:
1.
Chasmogamy
2.
Cleistogamy
3.
Geitonogamy
4.
Xenogamy
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Identify the incorrect statement regarding water-pollinated flowers:
| 1. | Pollination by water is rare and is seen in monocotyledons mostly |
| 2. | Pollen grains in most are covered by a mucilaginous covering |
| 3. | Produce nectar |
| 4. | Are not very colourful |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Whether a pollen grain will be able to germinate on a stigma is primarily decided by:
| 1. | The stage at which the pollen is shed |
| 2. | Recognition by the stigma |
| 3. | Maturity of the egg cell in the embryosac |
| 4. | Environmental conditions |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Syngamy in angiosperms results in the formation of:
| 1. | A haploid cell | 2. | A diploid cell |
| 3. | A triploid cell | 4. | A polyploid cell |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The outer hard layer of the pollen wall is made up of:
| 1. | Callose, which is easily digested by enzymes |
| 2. | Sporopollenin, which is resistant to all enzymes |
| 3. | Hemicellulose, which is difficult to digest by enzymes |
| 4. | Calcium pectate, which is easily digested by enzymes |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
In over 60 % of angiosperms, pollen grains are shed at:
| 1. | 2-celled stage | 2. | 3-celled stage |
| 3. | 4-celled stage | 4. | 1-celled stage |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Transfer of pollens from the anther to the stigma of the same flower is called:
| 1. | Autogamy | 2. | Geitonogamy |
| 3. | Xenogamy | 4. | Cleistogamy |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Majority of plants:
| 1. | Use abiotic agents for pollination |
| 2. | Use biotic agents for pollination |
| 3. | Do not use any agent for pollination |
| 4. | Use both abiotic and biotic agents for pollination. |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Pollens grains are long ribbon-like and are carried passively in water in:
| 1. | female plants remain submerged in water |
| 2. | male plants remain submerged in water |
| 3. | both male and female plants remain submerged in water |
| 4. | both male and female plants reach the surface of the water. |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Double fertilization is:
| 1. | Seen in some flowering plants |
| 2. | In seen in many flowering plants |
| 3. | Is seen in both flowering and non-flowering plants |
| 4. | Is a unique event of flowering plants |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
© 2024 GoodEd Technologies Pvt. Ltd.