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Additional Biology Key Points
Most animal cells contain a nucleus, cytoplasm, cell membrane, mitochondria and ribosomes.
Plant cells contain all the structures seen in animal cells as well as a cell wall and, in many cases
chloroplasts and as permanent vacuole filled with sap.
Enzymes control the chemical reactions inside…

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Living organisms remove materials from the environment as they grow. They return when they die
through the action of the decomposers.
Dead materials decay because they are broken down by microorganisms.
Decomposers work more quickly in warm moist conditions. Many of them also need s good supply of

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Your blood glucose concentration is monitored and controlled by pancreas.
Pancreas produces hormone insulin which allows glucose to move from the blood into the cells.
In diabetes, the blood glucose may rise to fatally high levels because the pancreas does not secrete
enough insulin. It can be treated by injections…


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