Essay on Biology 108 Worksheet

1037 Words Jan 25th, 2013 5 Pages
1. Define science – Science is the development of concepts about the natural world , often by using the scientific method 2. Define multicellular organism - are those organisms containing more than one cell, and having differentiated cells that perform various functions. 3. Identify the 3 domains of living things. Which domains include one-celled organisms with no nucleus? a) Organized, Homeostatic & Reproduce. b) Bacteria & Archaea 4. Modern taxonomists (scientists who classify organisms) no longer use the classification of the kingdom of Protists. List the three other kingdoms of Eukarya. Plants, Fungi & Animals 5. List and give a brief explanation of the steps of the scientific method. The …show more content…
15. An ion is an atom or molecule that has a (full) positive or negative charge because its number of electrons and protons is not equal. Give an example of an ion. Sodium & chloride 16. In a covalent bond _____________ are shared between two atoms. Electrons 17. A hydrogen bond always involves an atom of what element? Water 18. What keeps water from undergoing sudden changes in temperature? Hydrogen 19. How does hydrogen bonding play a role in making ice float? Water expands when it freezes because in ice the water molecules form a lattice in which the hydrogen bonds are farther apart than in liquid water. 20. If a solution has a pH of 9, would it be considered acidic, basic or neutral (pick one). Basic 21. Which has a higher hydrogen ion concentration, a solution with pH 3 or a solution with pH 8? pH3 22. What is the function of a buffer? To prevent pH changes. Name a bodily fluid that is buffered. Blood 23. List a) the 4 categories of organic macromolecules unique to cells. Then list b) the primary function(s) for each general type of macromolecule you listed in (a). Then list c) the subunits (monomers) for each macromolecule you listed in (a).
Carbohydrates –function is energy storage in all organisms. All carbohydrates are built up from monosaccharides or simple sugars
Lipids - a diverse group of molecules that play diverse roles for cells and organisms. Lipids contain carbon,

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