BIOLOGY CH21 Nutrition and Health — Science STD 9 — Question

The tendency of atoms to have eight electrons in the outer shell is known as ……………….

Three resistors are connected in series with a cell. If the current in each resistor is 1.5A, then the current through the cell will be …………………..

A substance must absorb …………….. so that it can melt.

Locomotion of phylum Echinodermata is affected by

………………… is a fluid-filled body cavity.

f-block elements are also known as …………………..

The ______ produces its own magnetic field, which shields the earth’s ozone layer from the …………… and is important in navigation.

In leaves, the food is stored in the form of……………………..

Rate of change of displacement is …………………

Charcoal, diamond and graphite are …………………….. forms of carbon.