Paheli dug two pits, A and B, in her garden. In pit A, she put a polythene bag packed with some
agricultural waste. In pit B, she dumped the same kind of waste but without packing it in
a polythene bag. She, then covered both the pits with soil. What did she observe after a month?
(a) Waste in pit A degraded faster than that in pit B.
(b) Waste in pit B degraded faster than that in pit A.
(c) Waste in both pits degraded almost equally.
(d) Waste in both pits did not degrade at all.

The correct option is B)

Explanation: (b) In comparison to pit A, pit B degraded faster because it was kept open and that's why it took oxygen much faster than pit A. Oxygen helps microbes to demoralize the organic waste. But, in the case of pit A, the plastic avoided the proper flow of air. That's why microbial degradation didn't take place in pit A.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

multiply it by 5 in order for you to understand i cant give an exact answer.