IB DP Biology: SL复习笔记5.2.2 Classifying Organisms
Examples of Classification Biological classification involves putting organisms into groups, or taxa (singular taxon) The taxa form a hierarchy A hierarchical system is one in which larger groups c...
IB DP Biology: SL复习笔记5.2.1 Classification System
Binomial System The diversity of life on Earth is vast, and is known as global biodiversity The extent of global biodiversity is such that scientists can only estimate the total number of species p...
新加坡六大公立大学有哪些？优势留学专业是什么呢？
新加坡华人居多，中国学生容易适应。新加坡华人占了78%，中国文化的精髓左右着这个社会的意识形态。本期主要介绍本科留学的新加坡六大公立大学有哪些？以及优势留学专业是什么呢？ 六所公立大学： 新加坡国立大学...
IB DP Biology: SL复习笔记5.1.5 Natural Selection Examples
Examples of Natural Selection Because evolution by natural selection generally happens over millions of years, it is difficult to see it taking place, and we often have to rely on evidence from the...
IB DP Biology: SL复习笔记5.1.4 Natural Selection
Overproduction of Offspring The number of offspring, or young, produced in each breeding event differs between species Some species produce small numbers of young, e.g. elephants usually give birth...
IB DP Biology: SL复习笔记5.1.3 Variation
Variation Differences exist between organisms of the same species These differences are known as variation Examples of variation include: Coat colour in mammals Body length in fish Flower colour in...
IB DP Biology: SL复习笔记5.1.2 Evolution: Evidence
Evidence for Evolution: Fossils Fossils are the preserved remains of organisms, or the traces left by organisms, such as footprints, burrows and faeces These remains can be preserved, e.g. in rocks...
IB DP Biology: SL复习笔记5.1.1 Evolution
Evolution Defined Species do not stay the same over time; the species that we see around us today have developed over millions of years This process of species change is known as evolution Evolutio...
IB DP Biology: SL复习笔记4.2.8 Skills: Carbon Cycling & Climate Change
Drawing the Carbon Cycle The many processes by which carbon is transferred from one store to another are collectively known as the carbon cycle During the carbon cycle, carbon is present in both or...
IB DP Biology: SL复习笔记4.2.7 Climate Change: Causes
Industrialisation & Increased Carbon Dioxide Atmospheric carbon dioxide levels have fluctuated throughout Earth's history due to events such as volcanic eruptions and the weathering of limeston...
IB DP Biology: SL复习笔记4.2.6 Climate Change: Impact
Greenhouse Gases & Climate Patterns Greenhouse gases absorb infrared radiation emitted by the earth, causing the atmosphere to warm Without greenhouse gases, the earth would be much colder The ...
IB DP Biology: SL复习笔记4.2.5 Climate Change: Greenhouse Effect
The Main Greenhouse Gases When radiation from the sun hits the earth, it is radiated back from the earth's surface as long-wave radiation A greenhouse gas is a gas that absorbs this re-radiated rad...
