IB DP Biology: HL复习笔记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: HL复习笔记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: HL复习笔记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: HL复习笔记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: HL复习笔记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...
IB DP Biology: HL复习笔记3.4.5 Skills: Genetic Modification & Biotechnology
Cloning Plants Design of an experiment to assess one factor affecting the rooting of stem-cuttings Stems can be cut so that roots develop from the cut end of the stem This is a way of cloning plant...
IB DP Biology: HL复习笔记3.4.4 Cloning
Cloning Clones are groups of genetically identical organisms, derived from a single original parent cell A cloned cell is a cell that is genetically identical to the cell that it originated from Se...
IB DP Biology: HL复习笔记3.4.3 Genetic Modification
Genetic Modification Genetic modification is carried out by gene transfer between species Genetic modification is a term usually used to refer to the transfer of DNA sequences from one species to a...
IB DP Biology: HL复习笔记3.4.2 DNA Profiling
Use of DNA Profiling DNA profiling involves comparison of DNA DNA profiling (genetic fingerprinting) enables scientists to identify suspects for a crime and identify corpses because every person (a...
