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Biology 1402 Dr. Held Exam 1 Latest Update
Graded A+
Evolution - -Change in the frequency of traits in a population.
Natural Selection - -Cause of the change in evolution.
Adaption - -Increase in fitness of population to it's environment
Heritable Variation - -Trait which is capable of being inherited and selected
DNA - -The genetic material that organisms inherit from their parents; a double-
stranded helical macromolecule consisting of nucleotide monomers with deoxyribose
sugar and the nitrogenous bases adenine (A), cytosine (C), guanine (G), and thymine (T).
genetic information - -Details of one's genetics
latitude - -horizontal distance
climate - -weather
tropics - -surrounds equater
temperate zones - -between arctic circle and tropic of cancer
prevailing winds - -blow in one direction
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rain shadow - -dry side of mountain
Biome - -Community of species that has adapted to a particular region.
Element - -A substance that cannot be broken down to other substances by
chemical means. Scientists recognize 92 occurring in nature.
Compound - -A substance containing two or more elements; NaCl (salt)
Atom - -Smallest particle of an element. Can NOT subdivide.
Molecule - -A particle in a compound.
Proton - -A subatomic particle with a single positive electrical charge, found in the
nucleus of an atom.
Neutron - -no charge particle;found in nucleus
atomic nucleus - -atom core; has protons & neutrons;holds the DNA
Electron - -A subatomic particle with a single negative electrical charge. One or more
move around the nucleus of an atom.
Nucleus - -An atom's central core, containing protons and neutrons.
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Isotopes - -Atoms of the same element that have different numbers of neutrons;
some are radioactive.
Isomers - -Organic compounds with the same molecular formula but different
structures and, therefore, different properties.
Ion - -An atom or molecule that has gained or lost one or more electrons, thus
acquiring an electrical charge. Atom with a net positive or negative charge.
Orbital - -"Cloud" occupied by an electron; shaped like a sphere or dumbbell
inert element - -elements on the periodic table where the outer electron shell is full
to capacity. (He, Ne, Ar..)
Electron level (shell) - -level of electron at an average distance from nucleus
Ionic Bond - -An attraction between two ions with opposite electrical charges. The
electrical attraction of the opposite charges holds the ions together.
Covalent Bond - -An attraction between atoms that share one or more pairs of outer-
shell electrons; symbolized by single line between the atoms
Hydrogen Bond - -A type of weak chemical bond formed when the partially positive
hydrogen atom participating in a polar covalent bond in one molecule is attracted to the
partially negative atom participating in a polar covalent bond in another molecule (or in
another part of the same macromolecule). -Attraction between a hydrogen atom and
another atom that has a partial negative charge.-
MERCYTRISHIADOCS DELL
Biology 1402 Dr. Held Exam 1 Latest Update
Graded A+
Evolution - -Change in the frequency of traits in a population.
Natural Selection - -Cause of the change in evolution.
Adaption - -Increase in fitness of population to it's environment
Heritable Variation - -Trait which is capable of being inherited and selected
DNA - -The genetic material that organisms inherit from their parents; a double-
stranded helical macromolecule consisting of nucleotide monomers with deoxyribose
sugar and the nitrogenous bases adenine (A), cytosine (C), guanine (G), and thymine (T).
genetic information - -Details of one's genetics
latitude - -horizontal distance
climate - -weather
tropics - -surrounds equater
temperate zones - -between arctic circle and tropic of cancer
prevailing winds - -blow in one direction
MERCYTRISHIADOCS DELL
,2
rain shadow - -dry side of mountain
Biome - -Community of species that has adapted to a particular region.
Element - -A substance that cannot be broken down to other substances by
chemical means. Scientists recognize 92 occurring in nature.
Compound - -A substance containing two or more elements; NaCl (salt)
Atom - -Smallest particle of an element. Can NOT subdivide.
Molecule - -A particle in a compound.
Proton - -A subatomic particle with a single positive electrical charge, found in the
nucleus of an atom.
Neutron - -no charge particle;found in nucleus
atomic nucleus - -atom core; has protons & neutrons;holds the DNA
Electron - -A subatomic particle with a single negative electrical charge. One or more
move around the nucleus of an atom.
Nucleus - -An atom's central core, containing protons and neutrons.
MERCYTRISHIADOCS DELL
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Isotopes - -Atoms of the same element that have different numbers of neutrons;
some are radioactive.
Isomers - -Organic compounds with the same molecular formula but different
structures and, therefore, different properties.
Ion - -An atom or molecule that has gained or lost one or more electrons, thus
acquiring an electrical charge. Atom with a net positive or negative charge.
Orbital - -"Cloud" occupied by an electron; shaped like a sphere or dumbbell
inert element - -elements on the periodic table where the outer electron shell is full
to capacity. (He, Ne, Ar..)
Electron level (shell) - -level of electron at an average distance from nucleus
Ionic Bond - -An attraction between two ions with opposite electrical charges. The
electrical attraction of the opposite charges holds the ions together.
Covalent Bond - -An attraction between atoms that share one or more pairs of outer-
shell electrons; symbolized by single line between the atoms
Hydrogen Bond - -A type of weak chemical bond formed when the partially positive
hydrogen atom participating in a polar covalent bond in one molecule is attracted to the
partially negative atom participating in a polar covalent bond in another molecule (or in
another part of the same macromolecule). -Attraction between a hydrogen atom and
another atom that has a partial negative charge.-
MERCYTRISHIADOCS DELL
