IB DP Biology: SL復習筆記4.2.3 Carbon Cycle: Methane
Methanogenesis Methane?(CH4) is a simple?hydrocarbon It is present as a?gas?in the atmosphere, and underground, and is the main component of?natural gas?fossil fuel Methane can be produced by the?n...
IB DP Biology: SL復習筆記4.2.2 Carbon Cycle: Carbon Dioxide in the Atmosphere
Respiration & Carbon Dioxide All living cells carry out some form of cellular?respiration, from bacteria, to plants, to animals Many organisms carry out?aerobic respiration Aerobic respiration ...
IB DP Biology: SL復習筆記4.2.1 Carbon Cycle: Carbon Dioxide
Carbon Fixation Carbon?is present in the?atmosphere?in the form of?carbon dioxide gas Carbon is taken out of the atmosphere by plants to be used in?photosynthesis Plants are?autotrophs Autotrophs u...
IB DP Biology: SL復習筆記4.1.9 Skills: Pyramids of Energy
Pyramids of Energy Pyramids of energy illustrate the?amount of energy contained?within the?biomass?of organisms at each trophic level The?length?of each box, or bar, represents the quantity of ener...
IB DP Biology: SL復習筆記4.1.8 Skills: Chi-squared test & Statistical Significance
Chi-squared Test for Association Looking for associations between species The distribution of species in a habitat is?rarely random; it usually depends on factors such as soil type, water availabil...
IB DP Biology: SL復習筆記4.1.7 Skills: Species, Communities, Ecosystems & Energy Flow
Identification of Trophic Level Classifying species as autotrophs, consumers, detritivores, or saprotrophs A species can be classified as an autotroph, consumer, detritivore, or saprotroph on the b...
IB DP Biology: SL復習筆記4.1.6 Energy Losses
Wasted Energy - Heat The process of?respiration?in living organisms?releases heat as a by-product This applies in?producers, consumers, detritivores, and?saprotrophs This?heat energy is lost from e...
IB DP Biology: SL復習筆記4.1.5 Energy Flow
Initial Source of Energy The sun is the initial (first) source of energy for most food chains Light energy?from the sun?is converted by producers into chemical energy?stored in the tissues of plant...
IB DP Biology: SL復習筆記4.1.4 Nutrient Cycling
Obtaining Inorganic Nutrients The individual organisms in an ecosystem need?organic molecules?to build their cells and tissues These molecules contain?carbon, hydrogen, oxygen, nitrogen, and phosph...
IB DP Biology: SL復習筆記4.1.3 Community
Community Species?do not exist by themselves in their own isolated environment; they?interact?with?other species, forming?communities A community can be defined as: Multiple populations of differen...
IB DP Biology: SL復習筆記4.1.2 Methods of Nutrition
Autotroph vs Heterotroph Organisms need?energy in the form of?ATP?to survive The energy stored in ATP comes from other?organic molecules,?such as carbohydrates,?and is transferred during the proces...
IB DP Biology: SL復習筆記4.1.1 Species & Population
Species A species can be defined as: A group of organisms that can interbreed to produce?fertile offspring The ability to breed and produce fertile offspring is a useful method of distinguishing sp...
