Practical Skill: Using Iodine to Detect Starch Grains Starch is the?storage polysaccharide?of plants Sugars formed during?photosynthesis?are stored as starch inside?starch grains These starc...
Practical Skill: Microscopy & Drawing Scientific Diagrams Many biological structures are too small to be seen by the naked eye Optical microscopes are an invaluable tool for scientists a...
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 ...
Prokaryotic v Eukaryotic Cell Structures Animal and plant cells are types of?eukaryotic?cells, whereas bacteria are a type of?prokaryote Prokaryotes have a cellular structure distinct from e...
Prokaryotic Cells Animal and plant cells are types of?eukaryotic?cells, whereas bacteria are a type of?prokaryote Prokaryotic cells are much?smaller?than eukaryotic cells (between 100 - 1000...
The Organisation of Cells As seen on the last page, in complex?multicellular?organisms?eukaryotic?cells become?specialised?for?specific functions. For example: Epithelial cells in the small ...
Adaptations of Eukaryotic Cells In complex?multicellular?organisms,?eukaryotic?cells become?specialised?for?specific functions These specialised eukaryotic cells have?specific adaptations?to...
The Structure of Eukaryotic Cells Cell surface membrane The structure of the cell surface membrane – although the structure looks static the phospholipids and proteins forming the bilayer ar...
進(jìn)入6月，美國(guó)本科秋季的招生將陸續(xù)開啟。作為院校考察申請(qǐng)學(xué)生水平的重要參考，不同學(xué)校對(duì)于IB和AP分?jǐn)?shù)有著不同的標(biāo)準(zhǔn)。接下來就為大家盤點(diǎn)下2022年QS排名里部分TOP學(xué)校對(duì)IB、AP的詳細(xì)要求。 01麻省理工學(xué)院 優(yōu)...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.4.4 Factorising Quadratics - General What is a quadratic expression? A quadratic expression looks like this:ax2?+ bx + c (as long as a ≠ 0) Note: If there are any hig...
Inorganic Ions An?ion?is an atom (or sometimes a group of atoms) that has an?electrical charge An ion that has a?+ve charge?is known as a?cation An ion that has a?-ve charge?is known as an?a...
Water in Cells Water is of great biological importance. It is the medium in which all metabolic reactions take place in cells. Between 70% to 95% of the mass of a cell is water As 71% of the...
