Biology For College

Biology For College

Ervin Erik Davidov
Sect. 5 Ch. 55 Ecosystems
  I. Ecosystems
        The ecosystem refers to the number of all the organisms living around nonliving factors with who they interact with.   A good example of an ecosystem would the lake, and a forest chemical cycling are the dynamics of the ecosystem. An example of energy would be the sunlight, it brings heat to the lake. An example of chemical cycling would be carbon and nitrogen cycled around living and nonliving components.. The lake is surrounded by both living and nonliving organisms. A river which flows and delivers nutrients to the lake. The food we eat, the water we drink, and the oxygen we breath are all part of the ecosystem.
  II.
  Energy flow
        A. First law of thermodynamics
              1. What are the implication of this law for biological systems?
      Energy is the ability to bring about change or to do work. Energy exists in many forms, such as heat, light, chemical energy, and electrical energy. Thermodynamics is the study of energy. Energy can be changed from one form to another, but it cannot be created or destroyed. The total amount of energy and matter in the Universe remains constant,   changing from one form to another. An example would be the sun giving energy to the water. I also think when we meditate outside we can feel the suns rays on our hands. Therefore getting energy from the sun.

        B. Second law of thermodynamics
              1. What are the implication of this law for biological systems?
      The Second Law of Thermodynamics is all energy exchanges, if no energy enters or leaves the system, the potential energy of the state will always be less than that of the initial state. This is also commonly referred to as entropy. An example would be a watch spring-driven watch which will run until the potential energy in the spring is converted, and not again until energy is reapplied to the spring to rewind it. My automatic watch stops after a day or so...