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...
數(shù)學(xué)建模，就是根據(jù)實(shí)際問題來建立數(shù)學(xué)模型，對數(shù)學(xué)模型來進(jìn)行求解，然后根據(jù)結(jié)果去解決實(shí)際問題。數(shù)學(xué)建模是一種數(shù)學(xué)的思考方法，是運(yùn)用數(shù)學(xué)的語言和方法，通過抽象、簡化建立能近似刻畫并解決際問題的一種強(qiáng)有...
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...
