Q. No.Look at the diagram given below and answer
appropriately
(i) Since ___A___ is associated with fruit, it is called
as ___(i)___ .
(ii) Since ___B___ is present, fruit cannot be called
as ___(ii)___ .
1. A - Pericarp, (i) - True fruits
2. B - Seed, (ii) - Ex-albuminous
3. A - Thalamus, (i) - True fruit
4. B - Seed, (ii) - Parthenocarpic
appropriately
as ___(i)___ .
(ii) Since ___B___ is present, fruit cannot be called
as ___(ii)___ .
2. B - Seed, (ii) - Ex-albuminous
3. A - Thalamus, (i) - True fruit
4. B - Seed, (ii) - Parthenocarpic
Find correct match
|
|
Column-I |
|
Column-II |
|
a. |
Thick and swollen cotyledons |
(i) |
Castor. |
|
b. |
Unused endosperm in mature seed |
(ii) |
Legumes |
|
c. |
Unused nucellus in seed |
(iii) |
Cashew nut. |
|
d. |
Thalamus contributes in fruit formation |
(iv) |
Beet. |
1. a(iii), b(iv), c(ii), d(i)
2. a(i), b(iii), c(iv), d(ii)
3. a(ii), b(i), c(iii), d(iv)
4. a(ii), b(i), c(iv), d(iii)
Which is an incorrect statement?
I. Each cell of sporogenous tissue in anther is capable of giving rise to microspore tetrad.
II. The pollen grain represent male gametophyte
III. Pollen grains are usually triangular and 10-15 um in diameter.
IV. Sporopollenin is one of the most resistant organic materials which can be destroyed only by strong acids and alkali.
1. I, II are incorrect but III, IV are correct
2. III, IV are incorrect but I, II are correct
3. I, III are incorrect but II, IV are correct
4. II, IV are correct but I, III are incorrect
The hilum is a scar on the
1. Seed, where micropyle was present
2. Seed, where funicle was attached
3. Fruit, where it was attached to pedicel
4. Fruit, where style was present
Mark the incorrect statement
| 1. | Outer three layers of anther wall are protective in function |
| 2. | Sporogenous tissue occupies the centre of each microsporangium |
| 3. | Cells of tapetum and endothecium show increase in DNA contents by endomitosis and polyteny |
| 4. | Ploidy level of microspore tetrad is haploid |
Choose the correct statement from the following:
| 1. | Cleistogamous flowers always exhibit autogamy |
| 2. | Chasmogamous flowers always exhibit geitonogamy |
| 3. | Cleistogamous flowers exhibit both autogamy and geitonogamy |
| 4. | Chasmogamous flowers never exhibit autogamy |
Which of the following is false about xenogamy?
1. It is the transfer of pollen grains from anther to stigma of another plant of the same species.
2. It produces genetic variation
3. It is genetically and ecologically (= functionally) cross pollination.
4. It occurs in cleistogamous flowers
Which of the following statements is false?
| I: | Vallisneria and Hydrilla are fresh water plants while sea-grasses (e.g. Zostera) are marine plant. |
| II: | Pollination in water lily / Lotus (Nymphea) and Eichhornia (water hyacinth) takes place by insects. |
| III: | In majority of aquatic plants flowers emerge above the level of water and are pollinated by insects or wind. |
| IV: | In most of the water pollinated species, pollen grains are protected from wetting due to presence of mucilaginous covering. |
| V: | In hydrophilous plants pollen grains are spherical. |
| 1. | All | 2. | None |
| 3. | V | 4. | IV |
The cell in the pollen grain which is responsible for giving rise to male gamete is
1. Rod shaped with dense cytoplasm
2. Of smaller size and float in the cytoplasm
3. Capable of dividing meiotically and give rise two male gamete
4. It has abundant food reserve and large irregularly shaped nucleus.
| A: | Pollen grains carry the male gamete from microsporangium to micropyle of ovule in angiosperms. |
| B: | Pollen grain itself a male gamete further divides and form another one on stigma only. |
1. Both A and B are correct
2. A is correct only
3. B is correct only
4. Both A and B are incorrect
© 2024 GoodEd Technologies Pvt. Ltd.