Q. No.Consider the given statements:
I.
Gemmules are asexual reproductive structures in sponges.
II.
In Bryophyllum, vegetative propagation takes place by leaf buds.
III.
Marchantia is monoecious and Chara is dioecious.
The correct statements are:
1.
Only I and II
2.
Only I and III
3.
Only II and III
4.
I, II, and III
The correct statements are:
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 animals exhibiting external fertilization:
| 1. | the offspring are less prone to predation |
| 2. | the reproduction is independent of water |
| 3. | there is synchrony between sexes for the release of gametes |
| 4. | the number of female gametes are highly reduced |
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.
Organisms relying completely on external fertilization are almost always likely to be found in:
1. Tropical forests
2. Moist environments
3. Aquatic habitats
4. Dry, arid 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.
In the given diagrams each part A, B, C and D shows a reproductive structure in an organism marked as ‘X’. Select the option where all parts are correctly matched:
|
A. |
 |
B. |  |
|
B. |
 |
D. |  |
| 1. | A: Oogonium of Chara; B: Archegoniophore of Marchantia; C: Conidia of Penicillium; D: Offset of Eicchornia |
| 2. | A: Antheridium of Chara; B: Antheridiophore of Marchantia; C: Sporangiophores of Penicillium; D: Offset of Eicchornia |
| 3. | A: Oogonium of Chara; B: Antheridiophore of Marchantia; C: Conidia of Penicillium; D: Offset of Eicchornia |
| 4. | A: Antheridium of Chara; B: Archegoniophore of Marchantia; C: Conidia of Penicillium; D: Stolon of Eicchornia |
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 animals exhibiting internal fertilization:
| 1. | the number of sperms produced is significantly reduced |
| 2. | a large number of offspring are produced per reproductive event |
| 3. | offspring are extremely vulnerable to predators |
| 4. | the chance of individual egg fertilization is high |
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.
A major disadvantage of external fertilization is:
| 1. | Lack of variations amongst the offspring |
| 2. | Need for the production of a significant number of male gametes |
| 3. | A high threat to the progeny for survival up to adulthood |
| 4. | The number of progeny per reproductive event will mostly be one |
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.
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.
Corresponding to ‘monoecious’ in a plant, the bisexual condition in a fungus would be best described as:
| 1. | Homothallic | 2. | Heterothallic |
| 3. | Hermaphrodite | 4. | Complete ad perfect |
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.
Consider the following statements:
| I: | Meiosis never occurs in organisms that are haploid |
| II: | Gametes are haploid and the parent plant body from which they arise must be diploid |
1. Only I is correct
2. Only II is correct
3. Both I and II are incorrect
4. Both I and II are correct
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 incorrectly matched pair:
1. Cockroach - Unisexual animal
2. Chara - Monoecious plant
3. Marchantia - Dioecious plant
4. Sweet potato - Unisexual flower
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.