Chapter 1 Outline - Chapter 1: Biology: Exploring Life 1.1...

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Chapter 1: Biology: Exploring Life 1. Life’s levels of organization define the scope of biology A. Life’s hierarchy of organization 1. Biosphere Ecosystem Community Population Organism Organ system Organ Tissue Cell Organelle Molecule B. Biosphere - consists of all the environments on Earth that supports life- most land, bodies of water, and lower atmosphere C. Ecosystem - consists of all organisms living in a particular area and the nonliving, physical components of the environment that the organisms interact with such as air, soil, water, and sunlight- e.g. Florida coast D. Community - entire array of organisms inhabiting an ecosystem- e.g. all organisms on Florida Coast E. Population - interacting group of individuals of one species- e.g. group of brown pelicans F. Organism - an individual living thing- e.g. brown pelican G. Organ system - consists of several organs that work together in performing a specific function- e.g. nervous system H. Organs - made up of several tissues- e.g. brain I. Tissues - each with a specific function and is made up of a group of similar cells- e.g. nervous tissue J. Cell - au nit of living matter separated from its environment by a boundary called a membrane- e.g. nerve cell K. Organelle - a structure that performs a specific function in a cell- e.g. nucleus L. Molecule - a cluster of atoms held together by chemical bonds- e.g. DNA molecule M. Atom - the smallest particle of ordinary matter 2. Living organisms and their environments form interconnecting webs A. Producers - plants and other photosynthetic organisms that provide the food for a typical ecosystem 1. Photosynthesis - plants trap energy from sunlight and use carbon dioxide (CO 2 ) from air, along with water (H 2 O) from the soil to make sugar molecules 2. Plants also absorb mineral nutrients from the soil and incorporate them into molecules B. Consumers - eat plants and other animals, taking in oxygen (O 2 ) from the air and then returning CO 2 and other wastes as chemicals to the environment
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C. Decomposers - bacteria, fungi, and small animals that decompose the remains of dead organisms, acting as recyclers, changing the complex dead matter into simple mineral nutrients that plant can use D. Two major processes of the ecosystem 1. Recycling of chemical nutrients - basic chemicals needed for life, including CO
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Chapter 1 Outline - Chapter 1: Biology: Exploring Life 1.1...

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