Biology 101 Review Essay

1086 Words Feb 15th, 2013 5 Pages
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Essay Sample
Bio 101 Review Sheet Test #1 (Chapters 1-3) Chapter 1 1. Cell is basic unit of life 2. Hierarchy of life figure 3. 3 Energy categories and examples of each Producer-plants and some microbes Consumer-humans and other animals Decomposer-fungi and other animals 4. Energy transfers are not 100% efficient – why? Cant capture all of the energy supplied by one source a. Where does all energy for biology come from? sun 5. Homeostasis- state of internal consistency or

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How theory is different than hypothesis hypothesis is tentative, theory reflects broader agreement
Chapter 2
1. Definitions of atom, matter, element
Atom-stuff of life
Matter-any material that takes up space
Element-pure substance that can’t be broken down by chemical means into other substances
2. Difference between bulk and trace elements (don’t memorize list)
Bulk-make up majority of living things
Trace-required in smaller amounts
3. 3 parts of atom
Proton, neutron, electron
4. Atomic number vs. atomic mass
Number-number of protons in nucleus
Mass-total number of protons and neutrons in nucleus
5. Isotope different forms of a single element with different numbers of neutrons
6. How many electrons are found in 1st and other valence shells
Two
7. Name of element group that does not react since their outer shell is full – noble gases
8. Difference between diatomic and compound molecule
Diatomic-molecule with two atoms of the same element
Compound-molecule with two or more different elements
9. Difference between ionic, covalent and hydrogen bonds
Ionic-electrons are given and taken between atoms
Covalent-forms when two atoms share electrons
Hydrogen-opposite partial charges on adjacent molecules attract to each other
10. 2 types of covalent bonds
Nonpolar
Polar
11. How water forms hydrogen bonds
12.
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