BIO 311C Lecture Notes - Lecture 1: Hydrogen Bond, Spontaneous Generation, Cellular Respiration
Document Summary
Spontaneous generation (abiogenesis)- the creation of living organisms from nonliving material (example: people used to think that raw meat produced flies: there is no spontaneous generation. Change in size or shape over time: metabolism (chemical interaction with environment) Uptake of resources: growth/reproduction, life = complexity. Biological hierarchy- biological systems are structured at many interrelated levels: biosphere, ecosystems, communities, populations, organisms, organs and organ systems, tissues, cells, organelles, molecules. Emergent properties- properties organisms have due to their level of complexity: examples: Surface tension: water is a liquid, but when you fall into it from a great height, it feels like a solid: exists when many water molecules exhibit cohesion through hydrogen bonding. Cohesion- water molecules stick together with other water molecules. Temperature moderation- water takes a longer time to cool down and heat up. Freezing- water is less dense as a solid than a liquid this is why ice floats in water.
