P-2 Heredity and Evolution — Science STD 10 — Question

In an atom of an element, extra-nuclear electrons take part in the chemical reaction.

State whether the following statement is true or false:
Only 10 per cent of the light energy given by the sun is available for transfer at each higher trophic level in a food chain.

A satellite needs a specific velocity to revolve in specific orbit.

The incident rays and refracting rays are on opposite sides of the normal.

• Right

• Wrong

The metal properties of the element decrease as the spiral moves from left to right.

Amino acids are obtained after digestion of proteins.

If the incident ray is parallel to the main axis, then the refracted ray passes through the main navel.

The refractive index of a medium (such as glass) does not depend on the wavelength of light.

Out of 2 – 4 million ova, approximately only 400 oocytes are released up to the age of menopause.

Mercury, silver, gold are highly reactive metals.

• Right

• Wrong