Edexcel IGCSE Maths 復(fù)習(xí)筆記 4.11.1 Area - Formulae What is area and why do we need to calculate it? Area?is the amount of space taken up by a two-dimensional shape Volume?deals with three-dimensio...
The Index of Diversity Once the abundance of different species in an area has been recorded the results can be used to calculate the?species diversity?or biodiversity for that area Species d...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 4.10.2 Sine & Cosine Rules, Area of Triangle - Harder Choosing which rule or formula to use It is important to be able to decide which Rule or Formula to use to ans...
Species Richness Species richness?is the?number?of species within a community A community is a group of populations of?different species?living in the same place at the same time that?intera...
Appreciating How Evolutionary Relationships Were Clarified In the past scientists encountered many difficulties when trying to determine the evolutionary relationships of species Using the physical...
Hierarchy of the Taxa The hierarchical classification system of organisms in biology is used to organise and?group similar organisms together?so that they can be more easily understood A hie...
Phylogenetic Classification Taxonomy is the practice of biological classification The phylogenetic classification system enables us to arrange species into groups based on their?evolutionary...
Required Practical: Affecting Microbial Growth When investigating the effect of antimicrobial substances on microbial growth it is essential that?aseptic techniques?are used Aseptic techniqu...
Adapting to the Environment Environmental factors that affect the chance of survival of an organism are?selection pressures For example, there could be high competition for food between lion...
