Gametes that are motile are often called sperm.
They are all the examples of organ system.
The food that we eat give us the energy that we have in our bodies. That energy can help us in out everyday lives .
Several examples of sphere interactions can be inferred from this photograph: Humans (biosphere) built a dam out of rock materials (geosphere). Water in the lake (hydrosphere) seeps into the cliff walls behind the dam, becoming groundwater (geosphere), or evaporating into the air (atmosphere).
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