AQA A Level Biology复习笔记3.6.6 The Mass Flow Hypothesis
Phloem: Mass Flow The Mass Flow Hypothesis was the model initially used to explain the movement of assimilates in the phloem tissue The mass flow hypothesis was modelled by Ernst Münch in 19...
AQA A Level Biology复习笔记3.6.5 The Sucrose Loading Mechanism
The Sucrose Loading Mechanism Assimilates such as sucrose are transported from source to sink through the phloem sieve tubes Carbohydrates are generally transported in plants in the form of ...
AQA A Level Biology复习笔记3.6.4 Movement in the Phloem
Movement in the Phloem Although translocation could refer to the transport of substances in the xylem and phloem, as it means ‘moving from one place to another,’ it is more commonly connecte...
AQA A Level Biology复习笔记3.6.3 Potometer Practical
Apparatus & Techniques: Using a Potometer Air movement, humidity, temperature and light intensity all have an effect on the rate at which transpiration occurs The table below explains ho...
AQA A Level Biology复习笔记3.6.2 Transpiration
Transpiration Explained The movement of water through a plants xylem is largely due to the evaporation of water vapour from the leaves and the cohesive and adhesive properties exhibited by w...
AQA A Level Biology复习笔记3.5.10 Required Practical: Dissecting Mass Transport Systems
Required Practical: Dissections Dissections are a vital part of scientific research They allow for the internal structures of organs to be examined so that theories can be made about how the...
Edexcel IGCSE Maths 复习笔记 3.11.4 Differentiation - Kinematics
Edexcel IGCSE Maths 复习笔记 3.11.4 Differentiation - Kinematics What is kinematics? Kinematics is the analysis of the motion of a particle linking the three vector quantities displacement, velocit...
Edexcel IGCSE Maths 复习笔记 3.11.3 Differentiation - Problem Solving
Edexcel IGCSE Maths 复习笔记 3.11.3 Differentiation - Problem Solving What problems could involve differentiation? Differentiation allows analysis of how one quantity changes as another does The gr...
Edexcel IGCSE Maths 复习笔记 3.11.2 Differentiation - Turning Points
Edexcel IGCSE Maths 复习笔记 3.11.2 Differentiation - Turning Points Remind me of the rule for differentiating powers If y = kxn then dy/dx = knxn-1 What is a turning point? Th...
