Chloroplasts: Structure & Function Chloroplasts are the organelles in plant cells where photosynthesis occurs Each chloroplast is surrounded by a double-membrane known as the chloroplast envelo...
ATP as a Supply of Energy All organisms require a constant supply of energy to maintain their cells and stay alive This energy is required e.g. For building new molecules from the products of diges...
Photosynthesis: An Overview Photosynthesis is a series of chemical reactions that occurs in producers such as plants and algae Photosynthesis converts light energy into chemical energy which is the...
Calculating the Efficiency of Biomass & Energy Transfers Transfer of energy through a food chain During photosynthesis organisms such as plants convert light energy into chemical energy stored ...
Net Primary Productivity During photosynthesis organisms such as plants convert light energy into chemical energy stored in biological molecules Organisms that do this are known as producers The ra...
Stages of Succession Ecosystems are dynamic, meaning that they are constantly changing The process of ecosystem change over time is known as succession During succession, the biotic and abiotic con...
Practical: Determining Distribution & Abundance Finding out about the abundance and distribution of species can be achieved by counting all of the organisms present in a habitat This is possibl...
Niches: Distribution & Abundance The place where a species lives is known as its habitat Species will occupy a specific niche within a habitat The term niche can be defined as the role of a spe...
Biotic Factors The abundance and distribution of a species within a habitat are determined by a combination of biotic and abiotic factors Biotic factors are living factors that influence population...
