BIO 181 QUIZ 1 GRAND CANYON UNIVERSITY / EXPERT
VERIFIED ACTUAL QUESTIONS & ANSWERS FOR
GUARANTEED PASS | NEWEST UPDATE, 20252026.
Terms in this set (66)
Polar Covalent Bond When an atom is bonded to a more electronegative
atom, the electrons of the bond are not shared equally.
(H2O).
Observation Gathering information, either through direct use of the
senses or with the help of tools such as microscopes,
thermometers, and balances that extend our senses. Can
reveal valuable information about the natural world
Hypothesis Tentative answer to a well-framed question -- an
explanation on trial. A rational account for a set of
observations, based on the available data and guided by
inductive reasoning.
Hypothesis-Based Systematic trial and error
Approach
Predominant Essential Humans need 25, plants need 17. Oxygen (O), Carbon (C),
Elements in Living Matter Hydrogen (H), and Nitrogen (N) -- make up 96% of living
matter. Calcium (Ca), Phosphorus (P), Potassium (K), Sulfur
(S), and a few other elements account for most of the
remaining 4% of an organism's mass.
Covalent Bond Sharing of a pair of valence electrons by two atoms.
Two atoms of the same element share electrons
Non Polar Covalent Bond equally because the two atoms have the same
electronegativity -- the tug-of-war is at a standoff.
, Ionic Bond Opposite charges, cations and anions attract each other.
Any two ions of opposite charge can form this. The ions do
not need to have acquired their charge by an electron
transfer with each other.
Hydrogen Bond When a hydrogen atom is covalently bonded to an
electronegative atom, the hydrogen atom has a partial
positive charge that allows it to be attracted to a different
electronegative atom nearby. Attraction between a
hydrogen and an electronegative atom.
Van der Waals Interactions Electrons are not always evenly distributed; at any instant,
they may accumulate by chance in one part of a molecule or
another. The results are ever-changing regions of positive
and negative charge that enable all atoms and molecules to
stick to one another.
Chemical Equilibrium The point at which the reactions offset one another
exactly. Dynamic equilibrium; reactions are still going on,
but with no net effect on the concentrations of reactants
and products.
Example of a Hydrogen The slightly positive hydrogen of one molecule is attracted
Bond to the slightly negative oxygen of a nearby molecule.
These two molecules are held together.
Cohesion Hydrogen bonds hold the substance together.
Contributes to the transport of water and dissolved
nutrients against gravity in plants.
Adhesion The clinging of one substance to another. Helps counter the
downward pull of gravity when hydrogen bonds to the
molecules of cell walls.
Affinity for water. Substances can be this without actually
Hydrophilic
dissolving.
Hydrophobic Substances that are nonionic and non polar (or otherwise
cannot form hydrogen bonds) actually seem to repel water.
VERIFIED ACTUAL QUESTIONS & ANSWERS FOR
GUARANTEED PASS | NEWEST UPDATE, 20252026.
Terms in this set (66)
Polar Covalent Bond When an atom is bonded to a more electronegative
atom, the electrons of the bond are not shared equally.
(H2O).
Observation Gathering information, either through direct use of the
senses or with the help of tools such as microscopes,
thermometers, and balances that extend our senses. Can
reveal valuable information about the natural world
Hypothesis Tentative answer to a well-framed question -- an
explanation on trial. A rational account for a set of
observations, based on the available data and guided by
inductive reasoning.
Hypothesis-Based Systematic trial and error
Approach
Predominant Essential Humans need 25, plants need 17. Oxygen (O), Carbon (C),
Elements in Living Matter Hydrogen (H), and Nitrogen (N) -- make up 96% of living
matter. Calcium (Ca), Phosphorus (P), Potassium (K), Sulfur
(S), and a few other elements account for most of the
remaining 4% of an organism's mass.
Covalent Bond Sharing of a pair of valence electrons by two atoms.
Two atoms of the same element share electrons
Non Polar Covalent Bond equally because the two atoms have the same
electronegativity -- the tug-of-war is at a standoff.
, Ionic Bond Opposite charges, cations and anions attract each other.
Any two ions of opposite charge can form this. The ions do
not need to have acquired their charge by an electron
transfer with each other.
Hydrogen Bond When a hydrogen atom is covalently bonded to an
electronegative atom, the hydrogen atom has a partial
positive charge that allows it to be attracted to a different
electronegative atom nearby. Attraction between a
hydrogen and an electronegative atom.
Van der Waals Interactions Electrons are not always evenly distributed; at any instant,
they may accumulate by chance in one part of a molecule or
another. The results are ever-changing regions of positive
and negative charge that enable all atoms and molecules to
stick to one another.
Chemical Equilibrium The point at which the reactions offset one another
exactly. Dynamic equilibrium; reactions are still going on,
but with no net effect on the concentrations of reactants
and products.
Example of a Hydrogen The slightly positive hydrogen of one molecule is attracted
Bond to the slightly negative oxygen of a nearby molecule.
These two molecules are held together.
Cohesion Hydrogen bonds hold the substance together.
Contributes to the transport of water and dissolved
nutrients against gravity in plants.
Adhesion The clinging of one substance to another. Helps counter the
downward pull of gravity when hydrogen bonds to the
molecules of cell walls.
Affinity for water. Substances can be this without actually
Hydrophilic
dissolving.
Hydrophobic Substances that are nonionic and non polar (or otherwise
cannot form hydrogen bonds) actually seem to repel water.
