How does an organism grow and change throughout its life

An organism goes through a cycle called development where it grows and changes. Living things can receive energy from their environment (eg:food) and use the energy to grow (get bigger, stronger, etc), develop and reproduce. Living things need energy in order to build up the substances that make up their cells.
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Because a model would make the investigation easier to understand

27. =3,500,000 x 4,000 = 14,000,000,000