Growth Factors in Flowering Plants Growth responses in plants Just like animals, the survival of plants is dependent on their ability to respond to changes in their environment Some plants p...
The Use of Natural & Artificial Fertilisers When organisms in natural ecosystems die or produce waste, the waste and dead matter decompose This decomposition is carried out by saprobiont...
Microorganisms Role in Recycling Minerals In natural ecosystems, nutrients (such as nitrogen and phosphorus) are recycled through food webs For example, these nutrients get passed on from pr...
Practical Skill: Investigate the Effect of Minerals on Plant Growth Photosynthesis produces carbohydrates Carbohydrates contain the chemical elements carbon, hydrogen and oxygen, which can b...
How Production is Affected by Farming Practices Farming practices can increase the efficiency of energy transfer in order to increase the total amount of energy available for human consumpti...
Maths Skill: Calculating Percentage Yield Farmers use various strategies to increase the yield of their crops or livestock. These strategies include: Reducing energy losses from crops to oth...
Maths Skills: Calculating Productivity and Efficiency within Ecosystems Given the appropriate data, it is possible to calculate the net productivity of producers or consumers and the efficie...
Primary & Secondary Productivity During photosynthesis, primary producers (such as plants and algae) convert light energy into chemical energy in biological molecules The storing of this...
Trophic Levels Net primary production (NPP) is the chemical energy that is stored in the plant’s biomass (after respiratory losses have been taken into account) This means NPP is the energy ...
