Question

Assertion (A): Super weeds are fast growing than crops and resistant to weedicides.
Reason (R): There is transfer of new genes into related wild species through natural out crossing.

• A. Both A and R are correct and R is the correct explanation of A
• B. Both A and R are correct but R is not the correct explanation of A
• C. A is correct but R is incorrect
• D. A is incorrect but R is correct

Hint:

Outcrossing of transgenic crops can lead to gene flow into wild relatives, possibly contributing to weed resistance — but not necessarily faster growth.

Answer 1

The Correct Option is D

- Assertion (A) is incorrect: Super weeds are indeed problematic and may resist herbicides, but the claim that they are generally "fast growing than crops" is not universally true or defining. Also, super weeds often emerge due to gene flow from genetically modified crops or herbicide overuse, not inherently because they grow faster.
- Reason (R) is correct: Gene transfer through natural outcrossing (cross-pollination) can occur between genetically modified crops and related wild species. This can introduce resistance traits (e.g., herbicide resistance) into wild populations, potentially leading to the emergence of super weeds.
Since R is a correct statement, but A is not, the correct answer is: A is incorrect but R is correct.

Answer 2

Assertion (A): Super weeds are fast growing than crops and resistant to weedicides.
Reason (R): There is transfer of new genes into related wild species through natural out crossing.

Explanation:
The assertion is incorrect because super weeds are not necessarily faster growing than crops; rather, they are weeds that have developed resistance to herbicides (weed killers), making them harder to control.

The reason is correct. Super weeds often arise due to the transfer of genes from genetically modified crops to related wild species through natural outcrossing (cross-pollination). This gene transfer can introduce traits like herbicide resistance into wild weed populations, making them 'super weeds' that survive herbicide applications.

Thus, while the assertion about fast growth is inaccurate, the cause mentioned in the reason is a valid explanation for the emergence of super weeds.

Correct Answer: Assertion is incorrect but Reason is correct