Learn · ⁨学习⁩

AP Biology · ⁨AP 生物⁩

Choose a lesson to begin. · ⁨选择一门课程开始。⁩

1 Chemistry of Life · ⁨生命的化学⁩ 0 / 7 Watch lesson · ⁨观看课程⁩

1.1 Structure of Water and Hydrogen Bonding · ⁨水的结构与氢键⁩ 1.2 Elements of Life · ⁨生命元素⁩ 1.3 Introduction to Macromolecules · ⁨大分子导论⁩ 1.4 Carbohydrates · ⁨碳水化合物⁩ 1.5 Lipids · ⁨脂质⁩ 1.6 Nucleic Acids · ⁨核酸⁩ 1.7 Proteins · ⁨蛋白质⁩

2 Cell Structure and Function · ⁨细胞结构与功能⁩ 0 / 10 Watch lesson · ⁨观看课程⁩

2.1 Cell Structure and Function · ⁨细胞结构与功能⁩ 2.2 Cell Size · ⁨细胞大小⁩ 2.3 Plasma Membrane · ⁨质膜⁩ 2.4 Membrane Permeability · ⁨膜的通透性⁩ 2.5 Membrane Transport · ⁨膜运输⁩ 2.6 Facilitated Diffusion · ⁨易化扩散⁩ 2.7 Tonicity and Osmoregulation · ⁨渗透压与渗透调节⁩ 2.8 Mechanisms of Transport · ⁨运输机制⁩ 2.9 Cell Compartmentalization · ⁨细胞区室化⁩ 2.10 Origins of Cell Compartmentalization · ⁨细胞区室化的起源⁩

3 Cellular Energetics · ⁨细胞能量学⁩ 0 / 5 Watch lesson · ⁨观看课程⁩

3.1 Enzymes · ⁨酶⁩ 3.2 Environmental Impacts on Enzyme Function · ⁨环境对酶功能的影响⁩ 3.3 Cellular Energy · ⁨细胞能量⁩ 3.4 Photosynthesis · ⁨光合作用⁩ 3.5 Cellular Respiration · ⁨细胞呼吸⁩

4 Cell Communication and Cell Cycle · ⁨细胞通讯与细胞周期⁩ 0 / 6 Watch lesson · ⁨观看课程⁩

4.1 Cell Communication · ⁨细胞通讯⁩ 4.2 Introduction to Signal Transduction · ⁨信号转导导论⁩ 4.3 Signal Transduction Pathways · ⁨信号转导通路⁩ 4.4 Feedback · ⁨反馈⁩ 4.5 Cell Cycle · ⁨细胞周期⁩ 4.6 Regulation of Cell Cycle · ⁨细胞周期的调控⁩

5 Heredity · ⁨遗传⁩ 0 / 5 Watch lesson · ⁨观看课程⁩

5.1 Meiosis · ⁨减数分裂⁩ 5.2 Meiosis and Genetic Diversity · ⁨减数分裂与遗传多样性⁩ 5.3 Mendelian Genetics · ⁨孟德尔遗传学⁩ 5.4 Non-Mendelian Genetics · ⁨非孟德尔遗传学⁩ 5.5 Environmental Effects on Phenotype · ⁨环境对表型的影响⁩

6 Gene Expression and Regulation · ⁨基因表达与调控⁩ 0 / 8 Watch lesson · ⁨观看课程⁩

6.1 DNA and RNA Structure · ⁨DNA 与 RNA 的结构⁩ 6.2 DNA Replication · ⁨DNA 复制⁩ 6.3 Transcription and RNA Processing · ⁨转录与 RNA 加工⁩ 6.4 Translation · ⁨翻译⁩ 6.5 Regulation of Gene Expression · ⁨基因表达的调控⁩ 6.6 Gene Expression and Cell Specialization · ⁨基因表达与细胞特化⁩ 6.7 Mutations · ⁨突变⁩ 6.8 Biotechnology · ⁨生物技术⁩

7 Natural Selection · ⁨自然选择⁩ 0 / 12 Watch lesson · ⁨观看课程⁩

7.1 Introduction to Natural Selection · ⁨自然选择导论⁩ 7.2 Natural Selection · ⁨自然选择⁩ 7.3 Artificial Selection · ⁨人工选择⁩ 7.4 Population Genetics · ⁨群体遗传学⁩ 7.5 Hardy-Weinberg Equilibrium · ⁨哈迪-温伯格平衡⁩ 7.6 Evidence of Evolution · ⁨进化的证据⁩ 7.7 Common Ancestry · ⁨共同祖先⁩ 7.8 Continuing Evolution · ⁨持续进化⁩ 7.9 Phylogeny · ⁨系统发育⁩ 7.10 Speciation · ⁨物种形成⁩ 7.11 Variations in Populations · ⁨群体中的变异⁩ 7.12 Origins of Life on Earth · ⁨地球生命的起源⁩

8 Ecology · ⁨生态学⁩ 0 / 8 Watch lesson · ⁨观看课程⁩

8.1 Responses to the Environment · ⁨对环境的响应⁩ 8.2.1 Energy Flow Through Ecosystems · ⁨生态系统中的能量流动⁩ 8.2.2 Matter Cycling Through Ecosystems 8.3 Population Ecology · ⁨种群生态学⁩ 8.4 Effect of Density on Populations · ⁨密度对种群的影响⁩ 8.5 Community Ecology · ⁨群落生态学⁩ 8.6 Biodiversity · ⁨生物多样性⁩ 8.7 Disruptions in Ecosystems · ⁨生态系统的干扰⁩