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Defining Life

Defining Life. Characteristics of Life. Characteristics of Life: Acquire Energy. Energy “E” Defined: the capacity to do work 1 Is obtained from the nutrients consumed 2 Metabolism are the chemical reactions that “E” is used in 3. Homeostasis

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Defining Life

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  1. Defining Life Characteristics of Life MiKeKiM Educational Services: Biology

  2. Characteristics of Life: Acquire Energy • Energy “E” • Defined: the capacity to do work1 • Is obtained from the nutrients consumed2 • Metabolism are the chemical reactions that “E” is used in3 • Homeostasis • Defined: the maintenance of internal environments3 • It takes “E” to do this • Homeo = Like stasis = Standing • Requires monitoring and correcting4 • Example: House Temperature5 MiKeKiM Educational Services: Biology

  3. Characteristics of Life: Respond • Responding • Defined: Ability to sense and take action1 • A response is in reaction to some stimulus2 • Example: What do you do if you put your hand into a flame? • You detect the stimulus of heat and respond by pulling your hand away.…and maybe a murmur of . ouch MiKeKiM Educational Services: Biology

  4. Activity 1: Laboratory Based Viewing Protists Amoeba Feeding 1. Notice that it exhibits responding to the environment by moving towards it prey. 2. Notice that it will break down its prey to acquire “E”. Rotifer Feeding 1. Notice that it exhibits responding to the environment by leans towards it prey then opened it mouth AND when threatened it pulled back. 2. Notice that it will break down its prey to acquire “E”. MiKeKiM Educational Services: Biology

  5. Activity 2 Explain what the stimulus is in the examples. Click your mouse to get the answer: 1. A plant moves turns towards the sun to get the light energy 2. A plants root grows towards a water source. 4. You smell food and you respond by salivating. Light is the stimulus Water is the stimulus Odor is the stimulus Back to the lesson MiKeKiM Educational Services: Biology

  6. Characteristics of Life: Reproduce • Reproduction • Defined: The process to create new generations • Types • Sexual: Requires two parents1 • Asexual: Requires one parent2 MiKeKiM Educational Services: Biology

  7. Activity 3: Laboratory Based Viewing Protists Paramecium Dividing Bacteria Dividing Euglena Dividing Hydra Dividing Yeast Dividing Which one(s) use Asexual Reproduction and by what process? Paramecium via Binary Fission Euglena via Binary Fission Hydra via Budding Yeast via Budding Which one(s) use Sexual Reproduction? Bacteria via Conjugation MiKeKiM Educational Services: Biology

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