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All objects around us, this book, your pen, and other things of nature such as rocks, water plants and animal substances – constitute the matter of the universe. Matter can be classified into pure substances and mixtures. A pure substance is a single, uncontaminated substance. A mixture is a physical combination of two or more pure substances. There are two types of pure substances known as elements and compounds.

All objects around us, this book, your pen, and other things of nature such as rocks, water plants and animal substances – constitute the matter of the universe. Matter can be classified into pure substances and mixtures. A pure substance is a single, uncontaminated substance. A mixture is a physical combination of two or more pure substances. There are two types of pure substances known as elements and compounds.

All objects around us, this book, your pen, and other things of nature such as rocks, water plants and animal substances – constitute the matter of the universe. Matter can be classified into pure substances and mixtures. A pure substance is a single, uncontaminated substance. A mixture is a physical combination of two or more pure substances. There are two types of pure substances known as elements and compounds.

A note for Crop Protection, plant pest survey.

Unit 3 – International AS Level Biology, it consists of two questions: Question 1 is based on any one of the experiments covered in the AS syllabus Question 2 is a reading comprehension question. A case study with questions based on the Article given and / or on your biological knowledge This document contains a Unit 3 prediction chart, use this to know which experiment you should study more. 99% accuracy in predicting what might you be tested on, in your actual Unit 3 exam (October 2019)

Unit 3 – International AS Level Biology, it consists of two questions: Question 1 is based on any one of the experiments covered in the AS syllabus Question 2 is a reading comprehension question. A case study with questions based on the Article given and / or on your biological knowledge This document contains a Unit 3 prediction chart, use this to know which experiment you should study more. 99% accuracy in predicting what might you be tested on, in your actual Unit 3 exam (June 2019)

AL - International A level Topic 1 - entire topic in ONE page! Topic 1 has to do with the Heart and it consists of 4 chapters. This document is an A3 page and contains all the key points, theories and key answers of Topic 1 in a single A3 page. This document can be used as a revision tool during the exams or for guidance during studying.

Transcription, splicing and translation are a few of the most important sections of A level Biology. This document contains all of the information you need (both from AS and A level) in order to answer any question about transcription, splicing, translation, mRNA and tRNA

Clinical trials (drug testing) is a section in topic 4 Question on clinical trial can be found in: • Unit 2 of IAL Biology Exam and • Paper 1 and 2 of Salters and Nuffield Biology A Exam In this document you will find: • Key point form summary for Withering trials • Key point form summary for Modern clinical trials • Comparison between the Withering and the modern clinical trials • Information on Placebo • Information on double blind studies • Why use animals for preclinical ...

References are very important: Allow you to acknowledge the contribution of other writers and researcher in your work Allow you to give credit to the writers from whom you have borrowed words and ideas A way to provide evidence to support your claims and conclusions Make your writing more persuasive In AS and A2 biology you will have to be able to write references. In Unit 3 question 2, the last part is usually about references This document is a guide of how to properly write references.