Solving Quadratics Equations How do I decide the best method to solve a quadratic equation? If it is a calculator paper then use your GDC to solve the quadratic If it is a non-calculator paper then...
Edexcel IGCSE Biology 復(fù)習(xí)筆記 3.2.4 Predicting Genetic Inheritance Family Pedigrees Family pedigree diagrams are usually used to trace the?pattern of inheritance?of a specific characteristi...
Edexcel IGCSE Biology 復(fù)習(xí)筆記 3.2.3 Genetic Inheritance Key Definitions A?gene?is a short length of DNA found on a chromosome that codes for a particular?characteristic?(expressed by the fo...
Edexcel IGCSE Biology 復(fù)習(xí)筆記 3.2.2 Protein Synthesis RNA Like DNA, the nucleic acid RNA (ribonucleic acid) is a?polynucleotide?– it is made up of many nucleotides linked together in a long...
Why is factorising quadratics useful? Factorising gives?roots (zeroes or solutions)?of a quadratic It gives the?x-intercepts?when drawing the graph How do I factorise a monic quadratic of the form?...
Edexcel IGCSE Biology 復(fù)習(xí)筆記 3.2.1 DNA & the Genome The Genome The?entire set of the genetic material?of an organism is known as its?genome In 2003, scientists completed a 13-year proj...
Edexcel IGCSE Biology 復(fù)習(xí)筆記 3.1.7 Human Sex Hormones Secondary Sexual Characteristics Primary sexual characteristics are present during development in the uterus and are the differences i...
Edexcel IGCSE Biology 復(fù)習(xí)筆記 3.1.6 Pregnancy Implantation & Development of the Foetus After fertilisation in the?oviduct, the zygote travels towards the?uterus This usually takes about...
Edexcel IGCSE Biology 復(fù)習(xí)筆記 3.1.5 Sexual Reproduction in Humans The Male Reproductive System The male reproductive system Male Reproductive Structures & th...
