Scientists once thought the most fundamental building block of matter was a particle called the atom. Now we know that the atom is made of many smaller pieces, known as subatomic particles. Every atom contains a central core called the nucleus, made of particles called protons and neutrons.
<span>- - D.feeding </span><span> This is called feeding because </span><span>activity distinguishes the larva stage from the pupa stage of an insect is feeding. </span><span /><span> </span>
