IB DP Biology: SL復習筆記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...
新加坡六大公立大學有哪些？優(yōu)勢留學專業(yè)是什么呢？
新加坡華人居多，中國學生容易適應。新加坡華人占了78%，中國文化的精髓左右著這個社會的意識形態(tài)。本期主要介紹本科留學的新加坡六大公立大學有哪些？以及優(yōu)勢留學專業(yè)是什么呢？ 六所公立大學： 新加坡國立大學...
IB DP Biology: SL復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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...
IB DP Biology: SL復習筆記4.2.4 Carbon Cycle: Organic Matter
Formation of Peat Under normal conditions the tissues of dead organisms are completely broken down by decomposers known as?saprotrophs?and?detritivores These decomposers require specific conditions...
