AQA A Level Biology复习笔记8.2.2 Stem Cells
Pluripotent & Unipotent Cells Pluripotent embryonic stem cells Pluripotent stem cells are embryonic stem cells that can differentiate into?any cell type found in an embryo?but are?not ab...
AQA A Level Biology复习笔记8.1.2 The Effect of Genetic Mutations
The Effect of Genetic Mutations Mutations occur?spontaneously?and?randomly?during DNA replication As the DNA base sequence determines the sequence of amino acids that make up a protein,?muta...
AQA A Level Biology复习笔记7.4.9 Investigating Species Distribution
Required Practical: Investigating Factors Affecting Species Distribution Understanding how to investigate the effects of?named environmental factors?on the?distribution?of a?given species?is an imp...
AQA A Level Biology复习笔记7.4.8 Conservation & Human Need
Conservation & Human Need Humans use many?resources?from the Earth such as?land?(for settlements and agriculture),?water,?wood?and?fossil fuels As the human?population?increases?and coun...
AQA A Level Biology复习笔记7.4.7 Growth Rate of Microorganisms
Apparatus & Techniques: Investigating Growth Rate Using Turbitity Measurements The?population growth rate?of microorganisms, such as bacteria or yeast, can be investigated by growing the...
Edexcel IGCSE Biology 复习笔记 2.7.5 Human Gas Exchange System
Edexcel IGCSE Biology 复习笔记 2.7.5 Human Gas Exchange System Structure of the Breathing System The lungs are the gas exchange surface in humans All gas exchange surfaces have features in common w...
AQA A Level Biology复习笔记7.4.6 Succession
Primary Succession Ecosystems are?dynamic, meaning that they are constantly?changing Sometimes, ecosystems change from being very?simple?to being relatively?complex This process is known as?...
AQA A Level Biology复习笔记7.4.5 Ecosystems
Ecosystems are Dynamic Ecosystems Species?do not exist by themselves in their own isolated environment, they interact with other species forming a?community The species within a community in...
Edexcel IGCSE Biology 复习笔记 2.7.4 Practical: The Effect of Light on Gas Exchange in Plants
Edexcel IGCSE Biology 复习笔记 2.7.4 Practical: The Effect of Light on Gas Exchange in Plants Practical: The Effect of Light on Gas Exchange in Plants Apparatus Boiling tubes Cotton wool Alu...
