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Multicellular organisms are organisms that consist of more than one cell.

The fourth planet from the Sun. Named after the Roman god of war. It is often referred to as the "Red Planet" because the iron oxide on its surface gives it a red colour. Mars is a rocky planet with a thin atmosphere, craters, valleys, dunes, and polar ice caps.

Country in East Africa

Where the southern magnetic lines enter the Earth.

Loss of a pregnancy.

Mathematical symbol for subtraction.

In biology, a mutation is an alteration in the nucleotide sequence of a genome or piece of DNA.

Mass is a measure of the amount of matter in an object. Mass is usually measured in grams (g) or kilograms (kg).

Country in North Africa.

A magnetic force exerted by magnets when they repel each other.