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Biology 101
Chapters 1-5
65
Biology
Undergraduate 1
09/05/2010

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Term
Evolution
Definition
is the process of change that has transformed life on Earth
Term
Biology
Definition
is the scientific study of Life
Term
biological hierarchy
Definition

 

§Life can be studied at different levels from molecules to the entire living planet
Term
Emergent properties
Definition
the property where cells become more complex as they rise from the molecular level
Term
Reductionism
Definition
is the reduction of complex systems to simpler components that are more manageable to study
Term
Systems biology
Definition

constructs models for the dynamic behavior of whole biological systems

"to build things  up"The diffrence in reduction and systems is reduction breakdown and systems build up

 

Term
kinetic engergy
Definition
Energy in motion
Term
Potential Energy
Definition

STORED ENERGY

Term
cells
Definition
is the lowest level of organization that can perform all activities required for life
Term
A eukaryotic cell
Definition
has membrane-enclosed organelles, the largest of which is usually the nucleus
Term
a prokaryotic cell
Definition
simpler and usually smaller, and does not contain a nucleus or other membrane-enclosed organelles
Term
DNA
Definition
is the substance of genes: inheritance transferred from parent to offspring; Each dna molecule is made up of two long chains arranged in a double helix. 
Term
Negative feedback
Definition
means that as more of a product accumulates, the process that creates it slows and less of the product is produced
Term
Positive feedback
Definition
means that as more of a product accumulates, the process that creates it speeds up and more of the product is produced
Term
Domains
Definition
followed by kingdoms, are the broadest units of classification
Term
Domain Bacteria and domain Archaea
Definition
comprise the prokaryotes
Term
Domain Eukarya
Definition

Protist kingdom include palntae, fungi, an animalia

a neucleus DNA

Term
The domain Eukarya includes three multicellular kingdoms
Definition

 

Plantae
Fungi
Animalia
Term
Darwin made two main points
Definition

 

Species showed evidence of “descent with modification” from common ancestors

---Natural selection is the mechanism behind “descent with modification

Term
Natural selection
Definition
is often evident in adaptations of organisms to their way of life and environment
Term
The word Science
Definition
is derived from Latin and means “to know”
Term
Qualitative
Definition
or descriptions rather than measurements
Term
Quantitative,
Definition

 

or recorded data, which is sometimes organized into tables and graphs
Term
Inductive reasoning
Definition
conclusions through the logical process of induction
Term
hypotheses
Definition
is a tentative answer to a well-framed question
Term
Deductive reasoning
Definition
Logic flows from general to specific;
Term
scientific method
Definition
is an idealized process of inquiry
Term
controlled experiment
Definition
control the variable to prove the test is operating correctly; To prove the test is good.
Term
Models
Definition

 

§representations of natural phenomena and can take the form of:
Diagrams
Three-dimensional objects
Computer programs
Mathematical equations
Term
matter
Definition
anything that takes up space and has mass
Term
element
Definition
is a substance that cannot be broken down to other substances by chemical reactions
Term
compound
Definition
is a substance consisting of two or more elements in a fixed ratio
Term
atoms
Definition
is the smallest unit of matter that still retains the properties of an element
Term
subatomic particles
Definition

 

¤Neutrons (no electrical charge)
¤Protons (positive charge)

Electrons (negative charge)

Term
Neutrons and  protons form
Definition
atomic nucleus 
Term
Neutron mass and proton mass are almost identical and are measured in
Definition
Daltons
Term
atomic number
Definition
is the number of protons in its nucleus
Term
mass number
Definition
is the sum of protons plus neutrons in the nucleus
Term
Atomic mass
Definition
the atom’s total mass, can be approximated by the mass number
Term
Isotopes
Definition
are two atoms of an element that differ in number of neutrons
Term
Energy
Definition
is the capacity to cause change
Term
Potential energy
Definition
is the energy that matter has because of its location or structure
Term
An electron’s state of potential energy is called its energy level, or
Definition
electron shell
Term
Valence electrons
Definition
are those in the outermost shell
Term
interactions usually result in atoms staying close together, held by attractions called
Definition
chemical bonds
Term
molecule
Definition
is a group of atoms held together by energy
Term
the energy holding two atoms together is called a
Definition

 

¤chemical bond
Term
A single covalent bond, or single bond
Definition
is the sharing of one pair of valence electrons
Term
A double covalent bond, or double bond
Definition

 

¨is the sharing of two pairs of valence electrons
Term
The notation used to represent atoms and bonding is called a
Definition
structural formula
Term
Bonding capacity is called the atom’s
Definition
valence
Term
Electronegativity
Definition
is an atom’s attraction for the electrons in a covalent bond
Term
nonpolar covalent bond
Definition
the atoms share the electron equally; neg. charge like oil
Term
polar covalent bond
Definition
is the sharing of a pair of valence electrons by two atoms; has a positive charge =water
Term
Ionic bond
Definition

Charged atom or molecule

(salt) (weak bond)

Term
Covalent bond
Definition
a Chemical bond formed by the sharing of one or more electrons, especially pairs of electrons between atoms (strongest bond)
Term
Ionic Bonds
Definition

involve the attraction of electrical charges

"magnets"

Term
Cation
Definition
postitively charged Ion
Term
Ionic Bondsare
Definition
are electrically charged particles the total number of electrons are not equal to the total number of protons
Term
Hydrogen Bond
Definition
The weekest bond. formes when a hydrogen atom convalently bonded to one electronegative atom is and is also attracted to another electronegative atom.
Term
chemical reaction
Definition
is the making and breaking of chemical onds reactant can rise to a product and can be reversed.
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