CIE A Level Biology復習筆記1.2.5 Viruses
Key Features of Viruses Viruses?are?non-cellular infectious particles?that straddle the boundary between ‘living’ and ‘non-living’ They are relatively simple in structure; much smaller than prokary...
CIE A Level Biology復習筆記1.2.4 Prokaryotic v Eukaryotic Cells
Structural Features of Typical Prokaryotic Cells Animal and plant cells are types of?eukaryotic?cells, whereas bacteria are a type of?prokaryote Prokaryotes have a cellular structure distinct from ...
CIE A Level Biology復習筆記1.2.3 The Vital Role of ATP
The Vital Role of ATP All organisms require a?constant supply of energy?to maintain their cells and stay alive This energy is required: In?anabolic?reactions – building larger molecules from smalle...
CIE A Level Biology復習筆記1.2.2 Animal & Plant Cells
Electron Micrographs: Animal Cells TEM electron micrograph of an animal cell showing key features Exam Tip You should be able to describe and interpret photomicrographs, electron micrographs and dr...
CIE A Level Biology復習筆記1.1.5 Calculating Actual Size
Calculating Actual Size When investigating the size of organisms and biological structures you will use a microscope of a specific magnification to produce an image Photomicrographs?are images obta...
CIE A Level Biology復習筆記1.1.4 Resolution & Magnification
Resolution & Magnification Magnification Magnification is how many times bigger the image of a specimen observed is in compared to the actual (real-life) size of the specimen A?light microscope...
CIE A Level Biology復習筆記1.1.3 Eyepiece Graticules & Stage Micrometers
Eyepiece Graticules & Stage Micrometers An?eyepiece graticule?and?stage micrometer?are used to measure the size of the object when viewed under a microscope Each microscope can vary slightly so...
CIE A Level Biology復習筆記1.1.2 Magnification Calculations
Magnification Calculations Magnification?is?how many times bigger?the image of a specimen observed is in comparison to the actual (real-life) size of the specimen The?magnification?(M) of an object...
CIE A Level Biology復習筆記1.1.1 The Microscope in Cell Studies
Microscope Slide Preparation In order to observe cellular material in more detail, specimens can be prepared for viewing under a light microscope Samples need to be thin?enough to allow light to pa...
AQA A Level Maths: Statistics復習筆記6.1 Large Data Set
Using a Large Data Set What is a large data set? As part of your course there is a large data set that you can use It contains lots of information You are not expected to memorise any results from ...
AQA A Level Maths: Statistics復習筆記5.3.2 Normal Hypothesis Testing
Normal Hypothesis Testing How is a hypothesis test carried out with the normal distribution? How is the critical value found in a hypothesis test for the mean of a normal distribution? What steps s...
AQA A Level Maths: Statistics復習筆記5.3.1 Sample Mean Distribution
Sample Mean Distribution What is the distribution of the sample means? For any given population it can often be difficult or impractical to find the true value of the?population mean,?μ The populat...
