AQA A Level Biology復(fù)習(xí)筆記2.3.1 Interphase
Interphase Within multicellular organisms,?not all cells retain the ability to divide Eukaryotic cells that do retain the ability to divide show a cell cycle Mitosis?is part of a?precisely controll...
2022北美丘獎(jiǎng)即將截止報(bào)名！附北美賽區(qū)日程安排
今年的北美丘獎(jiǎng)“姍姍來遲”，比去年晚了1個(gè)月才開始報(bào)名，但截止時(shí)間還是6月30日，論文的提交時(shí)間甚至還提前了10天！ 現(xiàn)在距丘獎(jiǎng)北美賽區(qū)截止報(bào)名只剩最后一周了！打算今年參賽、但還沒有報(bào)名的同學(xué)抓緊時(shí)間了！ ...
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.4.1 Roots & Indices - Basics
What are indices? An Index (plural = indices) is just a power that a number (called the base) is raised to: Laws of indices – what you need to know There are lots of very important laws (or ...
AQA A Level Biology復(fù)習(xí)筆記2.2.1 Methods of studying cells
The Principles & Limitations of Microscopy Microscopes?can be used to analyse?cell components?and observe?organelles Magnification?and?resolution?are two scientific terms that are very importan...
AQA A Level Biology復(fù)習(xí)筆記2.1.1 The Cell Theory
The Cell Theory Until microscopes became powerful enough to view individual cells, no-one knew for certain what living organisms were made from A scientist called?Robert Hooke?is thought to be the?...
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.3.2 HCFs & LCMs
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.3.2 HCFs & LCMs What are Factors & Multiples? Factors are numbers (or expressions) which divide into another number exactly e.g. 3 is a factor of 18 as?
AQA A Level Biology復(fù)習(xí)筆記1.6.1 The Structure of ATP
The Structure 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 ...
AQA A Level Biology復(fù)習(xí)筆記1.5.1 The Function of DNA & RNA
The Function of DNA & RNA Deoxyribonucleic acid?(DNA) and?ribonucleic acid?(RNA) are both types of?nucleic acid DNA and RNA are both?found in all living cells DNA and RNA are both needed to?bui...
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.3.1 Prime Factors
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.3.1 Prime Factors What are prime factors? Factors are things that are multiplied together Prime numbers are numbers which can only be divided by themselves and 1 The p...
AQA A LEVEL BIOLOGY復(fù)習(xí)筆記1.4.1 Many Proteins are Enzymes
Enzymes as Proteins Enzymes are?biological catalysts ‘Biological’ because they function in?living systems ‘Catalysts’ because they?speed up the rate of chemical reactions?without being used up or c...
Edexcel IGCSE Maths復(fù)習(xí)筆記1.2.1 Recurring Decimals
Edexcel IGCSE Maths復(fù)習(xí)筆記1.2.1 Recurring Decimals What are recurring decimals? A rational number is any number that can be written as an integer (whole number) divided by another integer When you...
AQA A LEVEL BIOLOGY復(fù)習(xí)筆記1.3.1 Amino Acids & the Peptide Bond
Amino Acids & the Peptide Bond Proteins Proteins are polymers (and macromolecules) made of monomers called?amino acids The sequence, type and number of the amino acids within a protein determin...
