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Biology 101 for Non-Science Majors

by: Samantha Davis

Biology 101 for Non-Science Majors BIOL-1408-09

Marketplace > Navarro College > Science > BIOL-1408-09 > Biology 101 for Non Science Majors
Samantha Davis


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About this Document

This is the first part of chapter one, which will be covered on the first exam on 9/20/2016.
Biology for Non-Science Majors
Prof. Lisa Dillman
Class Notes
Science, Biology
25 ?




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This 4 page Class Notes was uploaded by Samantha Davis on Wednesday August 31, 2016. The Class Notes belongs to BIOL-1408-09 at Navarro College taught by Prof. Lisa Dillman in Fall 2016. Since its upload, it has received 7 views. For similar materials see Biology for Non-Science Majors in Science at Navarro College.


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Date Created: 08/31/16
Biology for Non-Science Majors Chapter 1: A View of Life (Section 1.1) Biology is the study of life. In this section of the chapter, you should be able to distinguish levels of biological organization and identify the basic characteristics of life. Smallest to Largest: Atom- smallest unit of matter/element (composed of electrons, protons, and neutrons) Molecule- two or more atoms bonded together (of the same or different elements) Cell- smallest unit of life (structural and functional unit of all living organisms) Tissue- group of cells with similar functions and structure (muscle, skin, blood) Organ- two or more tissues functioning together for a specific task (heart, skeleton) Organ System- two or more organs working together (circulatory system, nervous system) Organism- an individual (the formation of the cell is what starts the build of the complex systems for an organism) Population- total number of a single species in a given area Community- all the population in an area (biotic/living factors) Ecosystem- biotic and ab1otic factors/community plus physical environment (rainfall, latitude, etc.) 1 Abiotic factors determine biotic factors. Biosphere- all ecosystems of planet Earth (all regions of the Earth that are inhabited by living organisms) o Organisms obey the same laws of chemistry and physics that govern the universe o Moving up through the list, you can distinguish that each new level acquires properties/unique characteristics of life o Some cells, such as Paramecium (a single-celled organism) can live independently, even sometimes clumping together to form colonies What Does Life Require? Energy- capacity to do work Metabolism- all chemical reactions that occur in a cell Photosynthesis- process that transforms solar energy into chemical energy for organic nutrients Homeostasis- to maintain a state of biological balance Development- change/grow Genes- genetic instructions passed through generations DNA (deoxyribonucleic acid) - molecules, which provides the blueprint/instructions for the genes (metabolism/organization) Mutations- inheritable changes in the genetic mutation (not all bad- could be as 2 simple as change in hair/eye color) 3 Reproduction- make an organism like itself Adaptations- modifications that help organisms to function in particular environments Evolution- the way in which a population of organisms change over generations to become more suited to their environment(s) o The above picture shows chemical cycling and energy flow within an ecosystem 2 Help create diversity of life. 3 Life only comes from life. o Energy flow and nutrient cycling in an ecosystem largely determine where ecosystems are found and what communities exist within them o Food provides nutrients- building blocks of energy o Living organisms respond by interacting with the environment as well as other living organisms-otherwise known as behavior(s) o Because energy does not cycle, ecosystems could not exist without solar energy and the ability of photosynthetic organisms to absorb it o Two most biologically diverse ecosystems- tropical rainforests and coral reefs o All living organisms have the capacity to evolve In this first part of the chapter we discussed: 1. The differences between the levels of biological organization-smallest to largest. Are you able to distinguish them? 2. The common characteristics of living organisms. What is needed for an organism to survive? 3. How do adaptations relate to change in evolution? Works Cited Mader, S. S., & Windelspecht, M. (2016). Biology. New York: McGraw-Hill Education.


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