Air is made up of several gases, but the two most important gases are Oxygen and Carbon dioxide. Without oxygen, animals will die, and without carbon dioxide, plants cannot survive<span>. Food (nutrients): Living things need energy for function. Energy is needed to grow, reproduce, move, and to work.</span>
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Answer:
Deoxyribonucleic acid (DNA)
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<span>Much like a cell, a virus is able to
Answer: </span>
<span> change over time.
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Answer:
terrestrial or aquatic.
Explanation:
All types of ecosystems fall into one of two categories: terrestrial or aquatic. Terrestrial ecosystems are land-based, while aquatic are water-based. The major types of ecosystems are forests, grasslands, deserts, tundra, freshwater and marine.
