Which of the following is a correct statement about biofertilizers? MCQ with Answer and Explanation

Explanation:
The Munch hypothesis, or mass flow hypothesis, explains the translocation of organic solutes (primarily sucrose) through the phloem. It proposes that the movement is driven by a turgor pressure gradient between the source (where sugars are loaded into the phloem, increasing osmotic pressure) and the sink (where sugars are unloaded, decreasing osmotic pressure). Water flows from xylem to phloem and back, driving the bulk flow.

Explanation:
Alexandre Yersin, a Swiss-French bacteriologist, discovered Yersinia pestis in 1894 during the Hong Kong plague epidemic. Koch discovered TB, Pasteur developed vaccines.

Explanation:
Respiration occurs 24/7, while photosynthesis only in light. The statement implies they alternate, which is false. R is true: photosynthesis needs light, respiration is continuous. So A is false, R true.