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27 Cards in this Set
- Front
- Back
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the study of life
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biology
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highly organized, tiny structures with membranes
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cell
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the process by which organisms make more of their own kind from one generation to the next
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reproduction
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is the sum of all of the chemical reactions carried out in an organism
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metabolism
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maintenance of stable internal conditions
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homeostasis
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sets of inherited instructions for making proteins
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gene
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passing of traits from a parent to an offspring
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heredity
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change in DNA of a gene
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mutation
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change in inherited traits of species over time
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evolution
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group of genetically similar organisms that produce fertile offspring
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species
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organisms with favorable genes are more likely to survive and reproduce
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natural selection
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science that studies interaction of living things with each other and nonliving
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ecology
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Who was Charles Darwin?
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nineteenth century British naturalist who came up with natural selection
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What is Metabolism? What is Homeostasis?
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Metabolism is the sum of all chemical reactions in an organism. Homeostasis is the maintenance of internal conditions.
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What is the order of scientific invetigation?
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Observation
asking questions hypotheses prediction experiments conclusions |
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What is a contol group? What is an experimental group?
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A control group is a group that receives no experimental treatment. An experimental group is a group that receives some type of experimental treatment.
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What are dependent variables?
What are independent variables? |
Dependent variables are measured (number of salamanders that hatched from the eggs). The independent variable is the factor that is varied (acid).
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Where does a dependent variable lay on a graph?
Where does an independent variable lay on a graph? |
Independent variable is on X axis and dependent variable is on Y axis.
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- smallest unit of matter that cannot be broken down by chemical means
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Atom
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Number of protons in an atom, represents number of electrons as well. Officially number of protons.
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Atomic Number
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All atoms are most stable when their outer electron levels are full
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Octet rule
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substance made of only one kind of atom, pure substance. (gold)
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element
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substance made of joined atoms of two or more different elements (salt)
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compound
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- group of atoms held together by a covalent bond (Carbon dioxide)
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molecule
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attraction between substances of same kind
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cohesion
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attraction of different substances (Polar)
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adhesion
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results from when one part of the molecule keeps shared electrons longer than the other part of the molecule. (water) .
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polarity
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