CIE IGCSE Biology: 复习笔记：20.1.5 Sustainability
CIE IGCSE Biology: 复习笔记：20.1.5 Sustainability Sustainable Use of Resources We use many resources from the Earth; some, such as food, water and wood, are sustainable resources A sustaina...
CIE IGCSE Biology: 复习笔记：20.1.4 Other Pollution
CIE IGCSE Biology: 复习笔记：20.1.4 Other Pollution Plastic Pollution Plastics have a large negative impact on both land and water habitats due to their non-biodegradability In marine habita...
CIE IGCSE Biology: 复习笔记：20.1.3 Water Pollution
CIE IGCSE Biology: 复习笔记：20.1.3 Water Pollution Untreated Sewage & Excess Fertiliser Human activities have led to the pollution of land, water and air Pollution comes from a v...
CIE IGCSE Biology: 复习笔记：20.1.2 The Importance of Biodiversity
CIE IGCSE Biology: 复习笔记：20.1.2 The Importance of Biodiversity Human Pressures on Other Species Biodiversity Is defined as the number of different species that live in a particular area Human a...
CIE IGCSE Biology: 复习笔记：20.1.1 Ensuring Food Supply
CIE IGCSE Biology: 复习笔记：20.1.1 Ensuring Food Supply Intensive Food Production Making food production more intensive means producing food more efficiently with a finite amount of land an...
CIE IGCSE Biology: 复习笔记：19.1.6 Populations
CIE IGCSE Biology: 复习笔记：19.1.6 Populations Definition of Population A population is defined as a group of organisms of one species, living in the same area at the same time Other important def...
CIE IGCSE Biology: 复习笔记：19.1.5 Nutrient Cycles
CIE IGCSE Biology: 复习笔记：19.1.5 Nutrient Cycles The Carbon Cycle Nutrients such as carbon and nitrogen are not endless resources There is a finite amount of each element on the planet an...
CIE IGCSE Biology: 复习笔记：19.1.4 Pyramids of Energy: Extended
CIE IGCSE Biology: 复习笔记：19.1.4 Pyramids of Energy: Extended Pyramids of Energy: Extended In order for the energy to be passed on, it has to be consumed (eaten) However not all of the en...
CIE IGCSE Biology: 复习笔记：19.1.3 Pyramids of Number & Biomass
CIE IGCSE Biology: 复习笔记：19.1.3 Pyramids of Number & Biomass Pyramids of Number A pyramid of numbers shows how many organisms we are talking about at each level of a food chain. The ...
