Fill in the blanks:(a) Microorganisms can be seen with the help of a_____.(b) Blue green algae fix ______directly from air to enhance fertility of soil.(c) Alcohol is produced with the help of ________.(d) Cholera is caused by ________.
Tick the correct answer.(a) Yeast is used in the production of :(i) sugar (ii) alcohol (iii) hydrochloric acid (iv) oxygen.(b) The following is an antibiotic :(i) sodium bicarbonate (II) streptomycin (iii) alcohol (iv) yeast.(c) Carrier of malaria-causing protozoan is :(i) female Anopheles mosquito (ii) cockroach (iii) housefly (iv) butterfly.(d) The most common carrier of communicable diseases is :(i) ant (ii) housefly (iii) dragonfly (iv) spider.(e) The bread or idii dough rises because of ;(i) heat (ii) grinding (iii) growth of yeast cells (iv) kneading(f) The process of conversion of sugar into alcohol is called(i) nitrogen fixation (ii) moulding (iii) fermentation (iv) infection.
Match the organisms in Column A with their action in Column B.Column A Column B(i) Bacteria (a) Nitrogen fixation(ii) Rhizobium (b) Setting of curd(iii) Lactobacillus (c) Baking of bread(iv) Yeast (d) Causes malaria(v) A protozoan (e) Causes cholera(vi) A virus (f) Causes AIDS
