Question

Answer these questions
only the ones from class 8th will answer or If you wanna answer then you need to have studied in class 8th before...​

Answer 1

Answer:

17)In the earliest years of antibiotic discovery the antibiotics being discovered were naturally produced antibiotics and were either produced by fungi, such as the antibiotic penicillin, or by soil bacteria, which can produce antibiotics including streptomycin,18) antibodies 19)

Explanation:

methods of preservation are drying, refrigeration, and fermentation. Modern methods include canning, pasteurization, freezing, irradiation, and the addition of chemicals. 20)ethanol fermentation. you can write only one example for each question mark me as brainliest