National 5 Biology Unit 3 Revision Complete Solutions

National 5 Biology Unit 3 Revision Complete Solutions Abiotic Refers to physical factors, such as temperature and light intensity, that affect ecosystems. Adaptation Feature of an organism that helps it to survive. aerobic In the presence of, or involving the use of, oxygen. Algal bloom A seasonal abundance of algae. Ammonium NH4; a nitrogen-containing waste product of decomposition. Biodiversity Refers to the number and abundance of species. Biological control Natural control of pests using natural predators, parasites or disease. Biome Region of the planet with characteristic climate, flora and fauna. Biotic Factor related to the biological aspects of an ecosystem such as predation and competition. Carnivore Consumer which eats other animals. Community All the organisms living in a habitat. Competition Interaction between organisms seeking the same limited resources. Consumer Animal which eats ready-made food. (Does not make their own food like plants do) Decomposers Organisms such as bacteria and fungi responsible for the breakdown of dead organic material. Denitrifying bacteria Convert nitrates in the soil into nitrogen gas, which is released into the atmosphere. Ecosystem Complex community of different species of animals and plants that are dependent on each other and the environment. Fauna The animals in a particular region/environment. Fertiliser Chemical added to the soil to improve plant growth or crop yield. Flora The plants of a particular region. Genetically modified