GMAS 5th Grade Science Practice Test

What is the basic unit of life whose parts work together?

Atom Molecule Cell Tissue

Correct Answer:

Cell

Explanation:

Life operates at the cellular level. The cell is the basic unit of life because it can perform all the activities living things do, and its parts work together to keep it alive and functioning. Inside a cell, organelles like those that generate energy, synthesize proteins, and regulate what enters and leaves the cell coordinate to carry out these tasks. In multicellular organisms, cells come together to form tissues, which then form organs and organ systems. Atoms and molecules are just building blocks of matter and aren’t alive on their own, while a tissue is made of cells. So the cell is the fundamental unit where life begins and everything inside it works in harmony.

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