BIOL 010 Lecture Notes - Lecture 2: Taxis, Phototaxis, Homeostasis
3 Sep 2015
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Document Summary
The key functions of life: order, stimuli, reproduction, growth/development, homeostasis, energy. Order: organisms are organized, coordinated structures of one or more cells. (single-celled organisms are microbes) In multicellular organisms: similar cells form tissues, tissues cooperate to form organs (body structures with a, organs work together to form organ systems. Single cells: even a single cell is a complex structure. Stimuli: organisms can respond to many types of stimuli, ex. Plants respond to light, climb on fences or trees, or even: chemicals - chemotaxis, stimuli can be characterized as either: It has to do everything - eat, dispose waste, move, etc. distinct function respond to touch. Light - phototaxis: positive (moving toward or reacting favorably, negative (moving away or reacting negatively) Growth and development: all organisms grow and develop following information found in their genes, genes provide the instructions that will direct cellular growth and development, this ensures that a species" young will grow up looking and.
