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...
Ecosystems: Key Terms Habitat Species are adapted, or well-suited, to life in a particular habitat A habitat can be defined as the place where an organism lives A habitat can be large, e.g. a deser...
Sustainability & Plant Materials Sustainability refers to the using resources in such a way that the requirements of the current generation are met without depleting these resources for future ...
Conditions Required for Bacterial Growth Bacteria are microscopic prokaryotes (meaning their cells do not contain a nucleus or membrane-bound organelles) They are often used in studies to test anti...
Development of Drug Testing Whenever new drugs are developed, they first need to be tested for effectiveness and side-effects, before they can be sold to the general public These are known as clini...
Practical: Determinig the Tensile Strength of Plant Fibres The tensile strength of a fibre refers to the maximum load it can carry before breaking For example, this information would be important w...
