AQA A Level Biology復習筆記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復習筆記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 ...
Edexcel IGCSE Biology 復習筆記 2.6.1 Energy
Edexcel IGCSE Biology 復習筆記 2.6.1 Energy ATP Organisms need energy for things such as: Chemical reactions?to build larger molecules from smaller molecules Muscle contraction?to allow move...
AQA A Level Biology復習筆記7.3.3 Selective Advantage
Selective Advantage Every individual within a species population has the?potential to reproduce?and have offspring In reality, however, there are many?environmental factors?that?prevent?ever...
AQA A Level Biology復習筆記7.3.2 Natural Selection
Natural Selection Every individual within a species population has the?potential to reproduce?and have offspring which contribute to population growth If all the offspring of every individua...
Edexcel IGCSE Biology 復習筆記 2.5.12 The Energy Content of Food
Edexcel IGCSE Biology 復習筆記 2.5.12 The Energy Content of Food Practical: Energy Content of a Food Sample We can investigate the energy content of food in a simple calorimetry experiment A...
Edexcel IGCSE Biology 復習筆記 2.5.11 Absorption
Edexcel IGCSE Biology 復習筆記 2.5.11 Absorption Absorption of Food & Water The Stages of Food Breakdown Food taken into the body goes through several?different stages?during its ...
Edexcel IGCSE Biology 復習筆記 2.5.10 Humans: Bile
Edexcel IGCSE Biology 復習筆記 2.5.10 Humans: Bile Bile Production Bile is an?alkaline?substance produced by cells in the?liver Before being released into the?small intestine?bile is stored ...
AQA A Level Biology復習筆記7.2.3 Hardy-Weinberg
Natural Selection: Hardy-Weinberg Principle The Hardy-Weinberg principle states that if certain conditions are met then the?allele frequencies of a gene within a population will not change f...
