Q. No.A few statements describing certain features of reproduction are given below:
| i. | Gametic fusion takes place |
| ii. | Transfer of genetic material takes place |
| iii. | Reduction division takes place |
| iv. | Progeny has some resemblance with parents |
Select the options that are true for both asexual and sexual reproduction from the options given below:
| 1. | i and ii |
| 2. | ii and iii |
| 3. | ii and iv |
| 4. | i 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.
Offspring formed by sexual reproduction exhibit more variation than those formed by Asexual reproduction because:
| 1. | Sexual reproduction is a lengthy process |
| 2. | Gametes of parents have a qualitatively different genetic composition |
| 3. | Genetic material comes from parents of two different species |
| 4. | Greater amount of DNA is involved in sexual reproduction |
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.
1. come to the flower
2. start producing seeds
3. start producing lateral branches
4. undergo secondary growth
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 correct statements:
| I. | Clear-cut vegetative, juvenile, and senescent phases are seen only in perennial plants. |
| II. | Neelakurinji flowers once in 12 years. |
| III. | Bamboo flowers only once in their lifetime. |
| 1. | Only III |
| 2. | Only II and III |
| 3. | Only I and II |
| 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.
1. Neelakurinji flower
2. Frangipanis flower
3. Ascocenda Princess Misaka flower
4. Ganges Primrose 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.
Birds in captivity (as in poultry farms) :
| 1. | lay eggs seasonally |
| 2. | can be made to lay eggs throughout the year |
| 3. | exhibit estrous cycles |
| 4. | exhibit menstrual cycles |
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.
Menstrual cycles occur in:
1. all animal females
2. all female mammals
3. female monkeys, apes, and humans
4. only in human females
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 few statements with regard to sexual reproduction are given below:
| i. | Sexual reproduction does not always require two individuals |
| ii. | Sexual reproduction generally involves gametic fusion |
| iii. | Meiosis never occurs during sexual reproduction |
| iv. | External fertilisation is a rule during sexual reproduction |
| 1. | i and iv | 2. | i and ii |
| 3. | ii and iii | 4. | i 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.
| Statement I: | Animals that have oestrous cycles resorb the endometrium if conception does not occur during that cycle and animals that have menstrual cycles shed the endometrium through menstruation instead. |
| Statement II: | In species with oestrous cycles, females are generally only sexually active during the oestrus phase of their cycle and females of species with menstrual cycles can be sexually active at any time in their cycle, even when they are not about to ovulate. |
| 1. | Statement I is correct, Statement II is incorrect. |
| 2. | Statement I is correct, Statement II is correct. |
| 3. | Statement I is incorrect, Statement II is correct. |
| 4. | Statement I is incorrect, Statement II is incorrect. |
| Assertion (A): | Gametes are haploid cells. |
| Reason (R): | All sexually reproducing organisms produce gametes only by meiosis. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
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.