Choose the correct alternative from the following : - Assertion (A) : Earthworms are not good for agriculture. Reason (R) : Earthworms break down the soil into fine particles and make it soft.
Choose the correct alternative from the following : - Assertion (A) : There is no vaccine for AIDS. Reason (R) : The AIDS virus changes its genetic code.
Choose the correct alternative from the following : - Assertion (A) : Appendix is a vestigial organ in human body. Reason (R) : It does not participate in digestion.
Choose the correct alternative from the following : - Assertion (A) : Weeds should not be allowed to grow along with crops. Reason (R) : Weeds leave no space for plants to grow.