Photosynthesis. Oxygen<span> is a by-product of the photosynthetic </span>process<span>.</span><span> The light-dependent reactions use H 2 O and </span>produce<span> O 2.</span>
<span>Tunicates resemble a rod on the sea floor.
Tunicates are members of the phylum Tunicata, and are intvertebrate animals. They are commonly known as sea squirts.
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The information that may be shown in an ecological pyramid is the relative amount of energy.
A food pyramid is wider at the bottom, at lower trophic levels, showing that there is a higher amount of energy available to the producers, and this energy reduces as we move up the trophic levels of the ecosystem.
