Perisperm differs from endosperm in:
1. | having no reserved food. |
2. | being a diploid tissue. |
3. | its formation by fusion of a secondary nucleus with several sperms. |
4. | being a haploid tissue. |
Which one of the following statements is not true?
1. | Pollen grains of some plants cause severe allergies and bronchial afflictions in some people. |
2. | The flowers pollinated by flies and bats secrete foul odour to attract them. |
3. | Honey is made by bees by digesting pollen collected from flowers. |
4. | Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups. |
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.
Flowers that have a single ovule in the ovary and are packed into inflorescence are usually pollinated by:
1. | Water | 2. | Bee |
3. | Wind | 4. | Bat |
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.
Cultivation of flowering and ornamental plants for gardens and for commerce and trade is called:
1. | Horticulture | 2. | Plant breeding |
3. | Floriculture | 4. | Micropropagation |
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 |
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.
How many cells of the female gametophyte are surrounded by a cell wall and are organized into cells?
1. | 6 | 2. | 7 |
3. | 8 | 4. | 2 |
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.
Cleistogamous flowers are:
1. | Mostly autogamous | 2. | Invariably autogamous |
3. | Mostly xenogamous | 4. | Invariably xenogamous |
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 the flowering plants produce:
1. | Female flowers | 2. | Male flowers |
3. | Hermaphroditic flowers | 4. | Neutral flowers |
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 artificial hybridization experiments, if the female plant produces unisexual flowers, emasculation:
1. | Must be done before maturity. |
2. | Must be done after maturity. |
3. | Must be done at maturity. |
4. | Is not needed. |
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 germ pore in the pollen wall:
1. | is an aperture in the pollen intine that allows the pollen tube to exit. |
2. | is the name of the nucleus of the microspore mother cell. |
3. | is formed where sporopollenin is located in the exine. |
4. | is an aperture in the pollen exine that allows the pollen tube to exit. |
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.