Elodea is a green plant. It makes glucose from carbon dioxide
and water, using light as energy. This is called photosynthesis.
Elodea can only photosynthesise when light shines on it. Elodea
produces oxygen during photosynthesis when light shines on the plant.
Glucose, made in photosynthesis, is a source of energy for Elodea. It is
used for the growth and repair of plant cells. Energy is transferred from
glucose to the cells during aerobic respiration. Elodea respires
at a steady rate all of the time, o makes carbon dioxide during aerobic
respiration.
Not all of the gas made in photosynthesis and respiration
will leave the plant as bubbles of gas. Some of the carbon dioxide made in
respiration will be used for photosynthesis, and some of the oxygen made in
photosynthesis will be used in respiration, so it all gets very complicated!
What is the gas produced by
Elodea? 