Biology :The need for improving the quality and quantity of food

May 20th, 2015
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A rapid population increase in this country imposes a greater demand on food supply. Thus, it is essential to improve the quality and quantity of food production to meet the demands of the food population.

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BiologyWelcome to the GCSE Biology revision section. Click on the links below to see resources for Cell Activity, Genetics and DNA, Green Plants as Organisms, Humans as Organisms, Living Things in their Environment and Polymerisation of Amino Acids. These resources are constantly being added to. Cell ActivityPlant Cells vs. Animal CellsBoth types of cell have these: - Nucleus - Cytoplasm - Cell membrane - Mitochondria (Energy is released here by respiration) Only plant cells have these: - Cell wall - Large vacuole - Chloroplasts Specialised CellsRoot hair cell in Plants: It is adapted to do its job of taking in water and nutrients by having: - a large surface area - a thin cell membrane The Sperm cell is an example of a specialised animal cell:Red Blood Cell - Carries oxygen around the body Adaptations: No nucleus, large surface area, so maximum area for oxygen carriers: haemoglobin White Blood Cell Fight disease, some make antibodies Adaptations - Irregular shape, they can change shape to squeeze out of blood vessels and get to the site of infection. Others have cytoplasm which can flow making it possible for the cell to change shape, surround and

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