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Biologists use a system of classification to organize information about the diversity of living things.
Aristotle’s System
Early Systems of Classification
Linnaeus’s System
Aristotle not classified organisms as either animals or plants.
classified organisms as either animals or plants.
was the first formal system of taxonomy
Binomial Nomenclature
The first part is the genus name, and the second part is the specific epithet, or specific name, that identifies the species.
The domain is the broadest of all the taxa and contains one or more kingdoms.
is the next higher taxon, consisting of similar, related genera.
Analogous characters are not those that have the same function but different underlying construction.
Homologous characters might perform different functions, but show an anatomical similarity inherited from a common ancestor.
The atomic number is the number of electrons
is equal to the mass of the nucleus (protons + neutrons)
is the number of electrons
Atomic mass – atomic number
atoms of the same elements with a different number of neutrons
Isotopes
neutrons
protons
all forms of energy exhibit both kinetic and potential work capacities
Molecules that contain atoms of Carbon, Hydrogen and usually Oxygen
synthesize
molecules
Organic compounds
Enzymes is
Healthy carbs are naturally occurring sugars
composed mainly of just the basic elements of other organic molecules
able to control this breakdown in order to harness the energy released
proteins that speed up or catalyze, specific chemical reactions
When two or more atoms combine chemically
convert the genetic info contained in DNA
molecules are formed
are like letters in a word, and genes are like complete “words” in a sentence
When two or more different atoms bond together to form a molecule, the molecule is called a compound
Chemical reaction is
compounds have properties different from those of the elements of which they are composed
when two or more atoms combine with or dissociate from each other
When two or more different atoms bond together
the domains in biology are
5
3
7
A chemical bond formed when electrons are completely transferred from one atom to another is
ionic bond
cavalent bond
nonpolar
cation
Anions: positively charged ions that result from the addition of an electron
Cation: a positively charged ion that results from the loss of an electron
bonds resulting from a shared pair of electrons
covalent bond
the picture shows one of the three types of chemical reactions
Decomposition reactions
Synthesis reactions
Exchange reactions
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