Homeostasis In order to?function?properly and?efficiently, organisms have different?control systems?that ensure their?internal conditions?are kept relatively?constant Physiological control systems ...
Edexcel IGCSE Maths復習筆記 1.7.1 Basic Percentages What is a percentage? “Per-cent” simply means “ ÷ 100” (or “out of 100”) You can think of a percentage as a standardised way of expressing a frac...
Muscle Pairs The?effective movement?of the human body requires both?muscle?and an?incompressible skeleton This is because muscles will only produce effective movement if they?pull on a structure?th...
Myelinated Motor Neurones Information is sent through the nervous system as?nerve impulses?– electrical signals that pass along nerve cells known as?neurones A bundle of neurones is known as a nerv...
Responding to Change Aids Survival Organisms must respond to changes in their environment in order to survive They can only survive if they are successful at: Finding favourable conditions for livi...
全美歷史最悠久、最負盛名、有中學生“小諾獎”的科研賽事再生元科學天才獎Regeneron STS ，相信不少美高學生對它并不陌生。 STS為未來STEM領域的領航者提供了一個國際的舞臺，這里匯聚了全美最優秀、最聰明的年輕...
關注科研的國內家長應該對“英才計劃”并不陌生。作為中國科協和教育部聯合組織的培養計劃，入選英才可以讓學生近距離接觸前沿的科學研究、接受知名高校教授的指導。 不僅如此，英才計劃還是世界規模最大的科研賽事...
Nutrient Cycles Living organisms require?nutrients?from their?environments?for?growth?and other processes (e.g. reproduction) These nutrients are then?returned?to the environment when organisms pro...
Plants are Primary Producers An?ecosystem?in a?particular area?includes: All the?living?components (i.e.?biotic factors?such as organisms and their interactions) All the?non-living?components (i.e....
