Manoj adds some yeast to two test tubes containing sugar solution. One test tube is kept in ice and the other at room temperature. The picture shows what happens after three hours.
How can Manoj confirm if the gas produced in the test tube at room temperature was due to the yeast growing in it?
Important Questions on Microorganisms: Friend and Foe
Manoj adds some yeast to two test tubes containing sugar solution. One test tube is kept in ice and the other at room temperature. The picture shows what happens after three hours.
What should Manoj keep the same in both the test tubes for a fair experiment?
Curd is formed only in
Refer to the given diseases.
(i) Athlete's foot
(ii) Amoebic dysentery
(iii) Polio
(iv) Cholera
(v) Malaria
(vi) Measles
(vii) Pyorrhea
(viii) Ringworm
(ix) Typhoid
(x) Tuberculosis
Select the option which correctly identifies bacterial diseases (P), viral diseases (Q), protozoan diseases (R) and fungal diseases (S).
(i) Diatoms float in water due to the presence of light stored fats with silica.
(ii) AIDS virus kills WBC and reduces the immunity of the body.
(iii) Escherichia coli is present in the intestine of humans where they help in the digestion of food.
(iv) A virus always consists of double strands of DNA or RNA surrounded by a protein coat.
