Which kind of diseases are more harmful to the body ?

Which kind of bond is present in water?

Which metals are harmful for health?

Name the infectious disease that leads to immunodeficiency and wasting of body parts. Give the scientific name of the pathogen causing the disease and mention the body organs it primarily affects.

Stunted growth, swollen face,. discoloration of hair and skin diseases are the symptoms caused by the deficiency of which nutrient in the body?

Which kind of movements are shown by Paramecium?

Name the types of cells which destroy harmful bacteria in the body?

Mention the kind of biodiversity of more than a thousand varieties of mangoes in India represent. How is it possible .

Which kind of organism have complex mode of reproduction?