Edexcel IGCSE Biology 复习笔记 2.7.1 Diffusion in Gas Exchange
Edexcel IGCSE Biology 复习笔记 2.7.1 Diffusion in Gas Exchange Diffusion in Gas Exchange Diffusion is the movement of molecules from a region of its higher concentration to a region of its l...
AQA A Level Biology复习笔记7.4.2 Abiotic & Biotic Factors
Abiotic & Biotic Conditions Niche The place where a species lives within an ecosystem is its habitat The role that a species plays within its habitat is known as its niche, including: Th...
Edexcel IGCSE Biology 复习笔记 2.6.3 Practical: Investigating Respiration
Edexcel IGCSE Biology 复习笔记 2.6.3 Practical: Investigating Respiration Practical: Investigating Respiration We can investigate the production of carbon dioxide and heat from respiration through ...
AQA A Level Biology复习笔记7.3.8 Investigating the Effects of Random Sampling on Allele Frequencies
Practical Skill: Investigating the Effects of Random Sampling on Allele Frequencies Investigations to mimic the effects of random sampling on allele frequencies in a population can be devised using...
Edexcel IGCSE Biology 复习笔记 2.6.2 Types of Respiration
Edexcel IGCSE Biology 复习笔记 2.6.2 Types of Respiration Aerobic Respiration Aerobic respiration requires oxygen It is defined as the chemical reaction in cells that uses oxygen to break down nutr...
AQA A Level Biology复习笔记7.3.7 Types of Speciation
Allopatric & Sympatric Speciation Evolution causes speciation: the formation of new species from pre-existing species over time, as a result of changes to gene pools from generation to g...
AQA A Level Biology复习笔记7.3.6 Reproductive Separation
Reproductive Separation Reproductive separation In order for evolution to occur the new species population must be genetically and reproductively separated from the pre-existing species popu...
AQA A Level Biology复习笔记7.3.5 Evolution
Evolution The allele frequencies (within the gene pool) of a population can change over time due to processes such as natural selection When the allele frequencies of a population change suf...
AQA A Level Biology复习笔记7.3.4 Types of Selection
Types of Selection & Their Effects Environmental factors that affect the chance of survival of an organism are referred to as selection pressures For example, there could be high levels ...
