Name the body part where fertilization occurs in human female.

List the sign conventions that are followed in case of refraction of light through spherical lenses. Draw a diagram and apply these conventions in determining the nature and focal length of a spherical lens which forms a four times magnified, real image of an object placed 20 cm from the lens.

The atomic numbers of three elements A, 8 and C are 11, 17 and 19 respectively. State giving reason which out of two elements will show similar chemical properties.

Write the main objective of conservation of biodiversity.

(a) How do Leishmania and Plasmodium reproduce?

(b) State one difference in their mode of reproduction.