Final Exam BIO 1320 Davenport exams
with correct answers 100%
Scientific Method - Correct Answer 1. hypothesis-tentative explanation for observations
2. prediction- if/then statement
3. experiment/observation- collect data
4. conclusion- hypothesis supported or not?
Variable - Correct Answer changeable characteristics of an experiment
Controls - Correct Answer used to keep all variables (except one) the same between experimental groups
Confounds - Correct Answer testing more than one at a time
Placebo - Correct Answer fake pill or substance
Scientific Theory - Correct Answer an explanation about something in the natural world that:
a. has been repeatedly tested
b. is well supported by all observations & experimental results
c. uses facts to explain the natural world
Everyday Theory - Correct Answer explain things in the natural world
Facts - Correct Answer repeatable observation that everyone can agree on, can only describe things in the natural world
Biology - Correct Answer the scientific study of living things 5 Characteristics of all Living Things - Correct Answer 1. organization- all living things are made up of atoms
2. energy use- life requires energy & nutrients to build new cells & structures, repair old ones, & to reproduce
3. Maintenance of internal constancy- homeostasis even as the surrounding environment changes
4. reproduction, growth, & development- reproduction transmits DNA from generation to generation
5. evolution- change in genetic make-up of a population over multiple generations
Atom - Correct Answer smallest unit of an element
Proton - Correct Answer positive charge
Neutron - Correct Answer no charge
Electron - Correct Answer negative charge
Atomic Number - Correct Answer the number of protons an atom has (top right number)
Atomic Mass - Correct Answer number of protons + neutrons (added together)
Isotopes - Correct Answer an atom with a different number of neutrons
Unstable Isotopes - Correct Answer considered radioactive
Electron Shells - Correct Answer 1st shell: up to 2 electrons
2nd shell: up to 8 electrons
3rd shell: up to 8 electrons
Electron Stability - Correct Answer electrons are most stable when the outer shell of the atom is full Ions - Correct Answer atoms that lose or gain electrons to become stable
Cation - Correct Answer atom that loses an electron will have a positive charge
Anion - Correct Answer atom that gains an electron will have a negative charge
Covalent Bonds - Correct Answer 2 atoms share electrons
Polar - Correct Answer electrons not shared evenly=charged
(between 2 atoms of different elements)
Nonpolar - Correct Answer electrons shared evenly=uncharged
(between 2 atoms of the same element)
Organic Molecules - Correct Answer must have both carbon & hydrogen, make up living things.
Functional Groups - Correct Answer small groups of non-hydrogen atoms
(make organic molecule unique)
Monomer - Correct Answer small organic molecules
Polymer - Correct Answer monomers joined to form bigger organic molecules
Dehydration Synthesis - Correct Answer monomers linked together into polymers (building)
1. H & OH removed = loss of water molecule (H2O)
2. Loss of H2O means atoms want to bond to stabilize (by forming covalent bonds)
3. Bond together: monomer + monomer = polymer
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