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Bio 100 Week 1 notes

by: Jess Baccari

Bio 100 Week 1 notes Biol 100

Jess Baccari
Bridgewater State University
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About this Document

These notes cover: - what biology is - the levels of organization -steps to the scientific method -cells & DNA
Intro to Biology Lab
Dr. Saman
Class Notes
Biology, Science, notes, cells, DNA




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This 3 page Class Notes was uploaded by Jess Baccari on Friday February 5, 2016. The Class Notes belongs to Biol 100 at Bridgewater State University taught by Dr. Saman in Spring 2016. Since its upload, it has received 47 views.

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Date Created: 02/05/16
Bio 100 (Chap 1) Jan 20,2016 ▯ Biology- the study of life and how living things and non-living things interact  Ex. living things with their environment ▯ Chap. 1 ▯ ▯ Levels of organization: ▯ 1. biosphere: all ecosystems together = biosphere ▯ 2. ecosystems: there are 10 ▯ 3. communities: groups of organizes ▯ 4. populations: the number of members in the community ▯ 5. organisms: each species ▯ 6. organ systems & organs: made up of tissues ▯ 7. tissues: made up of cells ▯ 8. cells: made up of organelles ▯ 9. organelles: made up of molecules and atoms ▯ 10. molecules & atoms: molecules are made up of atoms of the same element atoms are made up of protons. neutrons, and electrons ▯ What categorizes living things vs. non-living things?  Order: every living thing has a group  Regulation: response to the environment (adapt)  Growth & Development  Energy Utilization: need to make our own energy to develop  Response to the Environment  Reproduction  Evolution ▯ Scientific Theory/Method  Intro.  Method (procedure)  Results  Discussion  Conclusion ▯ More on Living things ▯ - All living things should be classified ▯ - All living things should respond to their environment -> helps them regulate their bodies  their genes help them do this -> when you respond to the environment your body decides whether or not certain genes should be activated or not ▯ - to grow and develop all living things need to create and use energy -> thing happens through metabolic reactions (catabolic and anabolic) ▯ - they also need to reproduce and evolve ▯ Ecosystems - each organism continuously interacts with living and non-living factors in its environment (or ecosystem) -the dynamics of any ecosystem depend on 2 main processes  cycling of nutrients  flow of energy ▯ ▯ ▯ ▯ Amino Acids & Proteins ▯ - some amino acids are essential, others are not  Humans get their essential amino acids from food  Non-essential your body can make ▯ -because we get our essential amino acids from food (plants) the Nitrogen process is important to us -> the plants need to get the nutrients first so that we can get it from them when we eat them ▯ -because plants create their own energy they are producers ▯ -animals need to get their energy from outside sources (food) so they are consumers ▯ ▯ Cells & Their DNA ▯ - the cell is the lowest level of structure that can preform all activities required for life ▯ all organisms are composed of cells (unicellular & multicellular) ▯ - viruses are non-living particles ▯ -there are two major types of cells  prokaryotic – no nucleolus (bacteria) ▯ - this cell is simpler and smaller, it contains no organelles ▯ - DNA in these cells in found free-floating in the cytoplasm  eukaryotic – have a nucleolus (plants & animals) ▯ - this cell is larger, more complex, and contains organelles ▯ (Nucleus is the largest organelle, usually) ▯ - DNA found in neuleaous ▯ - all cells use DNA as the chemical material of genes -> genes transmit info from parents to offspring ▯ - DNA is made up of 4 letters -> A,G,C,T ▯ - humans have about 25,000-30,000 genes & 46 chromosomes ▯ ▯


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