Q. No.A plant with both male flowers and female flowers is called as:
1.
Unisexual
2.
Bisexual
3.
Dioecious
4.
Monoecious
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 flower that produces only pollens is called as:
| 1. | Perfect flower | 2. | Staminode |
| 3. | Dioecious | 4. | Staminate |
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.
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:
|
|
Organism |
Chromosome number in a meiocyte |
|
1. |
Ophioglossum |
630 |
|
2. |
Housefly |
12 |
|
3. |
Maize |
20 |
|
4. |
Butterfly |
380 |
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 several simple plants like algae, bryophytes, and pteridophytes, water is the medium through which gamete transfer takes place. To increase the chances of fertilization, such plants:
| 1. | Produce a large number of female gametes that are non-motile |
| 2. | Produce a large number of male gametes that is several thousand times the number of female gametes produced |
| 3. | Produce a large number of female gametes that is several thousand times the number of male gametes produced |
| 4. | Do not have the capability of reproducing asexually |
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 reproductive strategy that involves the development of a female (rarely a male) gamete (sex cell) without fertilization is called:
| 1. | Parthenogenesis | 2. | Parthenocarpy |
| 3. | Panmixis | 4. | Amphimixis |
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 two statements:
| I: | Organisms exhibiting external fertilisation show great synchrony between the sexes. |
| II: | Such organisms release a large number of gametes into the surrounding medium (water). |
| 1. | Both I and II are correct and II explains I. |
| 2. | Both I and II are correct but II does not explain I. |
| 3. | I is correct but II is incorrect. |
| 4. | Both I and II are incorrect. |
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 variation in the progeny |
| 2. | The number of progeny produced can only be one or few |
| 3. | The offspring are extremely vulnerable to predators threatening their survival up to adulthood |
| 4. | The progeny have a very short life span and a low reproductive potential |
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.
When compared to external fertilization, in cases where internal fertilization takes place in sexually reproducing organisms:
| 1. | The progeny are afforded better protection |
| 2. | The number of male gametes are highly reduced while the number of female gametes is increased |
| 3. | Male gamete is non-motile and the female gamete has to reach it |
| 4. | In seed plants the non-motile male gametes are carried to the female gamete by pollen tubes |
Identify the correct statements from the options given below :
| I. | Only I and II are correct |
| II. | Only III and IV are correct |
| III. | Only I and IV are correct |
| IV. | Only II and III 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.
© 2024 GoodEd Technologies Pvt. Ltd.