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...
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 ...
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 Practical: The Effect of Light on Gas Exchange in Plants Apparatus Boiling tubes Cotton wool Alu...
Edexcel IGCSE Biology 复习笔记 2.7.3 Plants: Gas Exchange in Photosynthesis & Respiration Gas Exchange: Photosynthesis & Respiration The processes of respiration and photosynthesis b...
Estimating the Size of a Population Measuring all the different levels of biodiversity within an ecosystem could be very time consuming Finding out which species live in an ecosystem and the...
Edexcel IGCSE Biology 复习笔记 2.7.2 Leaf Structure Leaf Structure The structure of the leaf is adapted to carry out both photosynthesis and gas exchange The different cell types (palisade m...
Carrying Capacity The maximum stable population size of a species that an ecosystem can support is known as the carrying capacity Every individual within a species population has the potenti...
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...
