Edexcel IGCSE Biology 復習筆記 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 復習筆記 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 復習筆記 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 復習筆記 3.1.5 Sexual Reproduction in Humans The Male Reproductive System The male reproductive system Male Reproductive Structures & th...
Quadratic Functions & Graphs What are the key features of quadratic graphs? The value of?a?affects the shape of the curve If?a?is?positive?the shape is?concave up?∪ If?a?is?negative?the shape i...
Edexcel IGCSE Biology 復習筆記 3.1.3 Practical: Conditions for Germination Practical: Conditions for Germination Germination?is the?start of growth in the seed Three factors are required for...
Equations of a Straight Line How do I find the gradient of a straight line? Find two points that the line passes through with coordinates (x1, y1) and?(x2, y2) The gradient between these two points...
Edexcel IGCSE Biology 復習筆記 3.1.2 Sexual Reproduction in Flowering Plants Pollination Flowers are the?reproductive organs?of plants They usually contain both male and female reproductive ...