Biology

BIOLOGY 1

Unit Section	Elements	Soil-Net Links
11.5 What determines where particular species live and how many of them there are?
	How organisms are adapted to the conditions in which they live	Soil the living being Soils and ecology Soil and biodiversity Loss of biodiversity
	The factors for which organisms are competing in a given habitat	Soil the living being Soils and ecology Soils and biodiversity Loss of biodiversity
	Reasons for the distribution for animals or plants in a particular habitat	Soil the living being Soils and ecology
	To survive, organisms require a supply of materials from their surroundings and from the other living organisms living there	Soil the living being Soils and ecology
	Plants often compete with each other for light and for water and nutrients from the soil	Soils and plants Soils and ecology
	Organisms have features (adaptations) which enable them to survive in the conditions where they normally live e.g. deserts, the Arctic	Soils in Britain Soils of the world
	Animals and plants may be adapted to cope with specific features of their environment e.g. thorns, poisons and warning colours to deter predators	Soil the living being Soils and ecology
11.6 Why are individuals of the same species different from each other? What new methods do we have for producing plants and animals with the characteristics we prefer?		Soils and plants Soils and ecology Soils and acidity
	To make informed judgements about the economic, social and ethical issues concerning cloning and genetic engineering, including GM crops	Loss of biodiversity
11.8 How do humans affect the environment?
	Weigh evidence and form balanced judgements about some of the major environmental issues facing society including the importance of sustainable development	Soils and erosion Soils and desertification Soils and acid rain Soils and pollution Soils and biodiversity Salinisation
	Rapid growth in the human population and an increase in the standard of living means that: - raw materials, including non-renewable energy resources, are rapidly being used up - increasingly more waste is produced - unless waste is properly handled more pollution will be caused	Soils and climate change Soils and sustainabilty The loss of biodiversity Soils and climate change Soils and waste disposal Soil pollution
	Humans reduce the amount of land available for other animals and plants by building, quarrying, farming and dumping waste.	Soils and waste disposal Soil pollution Threat of soil pollution
	More waste is being produced which, unless properly handled may pollute: - water - with sewage, fertiliser or toxic chemicals - air - with smoke and gases such as sulphur dioxide which contribute to acid rain - land - with toxic chemicals, such as pesticides and herbicides, which may be washed from land into water	Soils and fertilisers Soils and acid rain Soils and climate change Soils and waste disposal Soil pollution Threat of soil pollution
	Living organisms can be used as indicators of pollution: - lichens can be used as air pollution indicators - invertebrate animals can be used as water pollution indicators	Soil pollution Soils and water
	Large scale deforestation in tropical areas, for timber and to provide land for agriculture, has: increased the release of carbon dioxide into the atmosphere (because of burning and the activities of micro-organisms) reduced the rate at which carbon dioxide is removed from the atmosphere and 'locked up' for many years as wood	Soils and forestry Soils and deforestation Soils and climate change
	Loss of forest leads to reduction in biodiversity. Some of the organisms that are lost may have been of future use.	Soils and biodiversity Soils and biodiversity
	Increases in the numbers of cattle and rice fields have increased the amount of methane into the atmosphere.	Soils and climate change Climate change concerns Climate change soil functions
	Carbon dioxide and methane in the atmosphere absorb most of the energy radiated by the Earth. Some of this energy is re-radiated back to the Earth and so keeps the Earth warmer than it would otherwise be. Increasing levels of these gases may be causing global warming by increasing the 'greenhouse effect'. An increase in the Earth's temperature of only a few degrees Celsius: - may cause quite big changes in the Earth's climate - may cause a rise in sea level	Soils and climate change Climate change concerns Climate change soil functions
	Improving the quality of life without compromising future generations is known as sustainable development. Planning is needed at local, regional and global levels to manage sustainability	Soils and sustainability Soils and food safety Population growth and food