Answer the following question:?

a) Name the pests that lady bird & dragon flies help to get rid of respectively? 1??b) Name any two gases produced during secondary treatment of Sewage? 1?

c)?Write the scientific name of the microbe used for fermenting malted cereals??and fruit juices. 1?

d)?What is interferon? How do they monitor the infection of new cells??


A - Ladybird is used to get rid of aphids. Dragon flies are used to get rid of mosquitoes. 

B The gases produced during secondary sewage treatment are ammonia and methane. 
C - Saccharomyces cerevisiae or yeast is used in fermentation.
D - Interferons are a group of signaling proteins formed in response to the presence of virus. They monitor the infection of new cells by increasing anti viral defence in nearby cells. 


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