Who discovered penicillin?

Male mosquitoes feed on which of the following?

Which one of the following organisms is used as an indicator of water quality?

Consider the following statements $(A-D)$ about organic farming.
$(A)$ Utilizes genetically modified crops like Bt cotton
$(B)$ Uses only naturally produced inputs like compost
$(C)$ Does not use pesticides and urea
$(D)$ Produces vegetables rich in vitamins and minerals
Which of the above statements are correct?

Which of the following is not an example of a microbe?

Which of the following organisms are considered microbes?