©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
BIO 121 Exam 1 Questions and Answers
100% Pass
True or False: nothing in science is proven - ANS True
Theory - ANS well substained explanation of something in the natural world that can
incorporate facts, laws, hypothesises etc
Gravitational Theory - ANS gravity is factual, there is a vast body of knowledge that explains
the facts of gravity
facts, inferences, laws, tested hypothesis
Evolutionary theory - ANS facts. evolution itself is factual. inferences, laws
evolution accounts for the unity and diversity of life
emergent properties - ANS new properties emerge at each level in biological hierarchy
result from arrangement of parts in an ecosystem/community
number of protons determines: - ANS what chemical element it is
isotopes - ANS same element, different number of neutrons
valence shells - ANS determine chemical properties
1
, ©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
lose, gain, or share to fill valence shell
how many electrons are needed to fill a valence shell? - ANS 8
except H and He (2)
silicon dioxide - ANS sand, glass
atoms are joined by chemical bonds to form: - ANS compounds
chemical formula - ANS gives type and relative number of atoms in sequence
covalent bonds - ANS outer shells of atoms have joined. strong and stable. atoms share
valence electrons
Nonpolar - ANS if electrons are shared equally
polar - ANS if electrons are not shared equally (H2O)
if one element is more electronegative than the other
ionic bonds - ANS form between positive (cations) and negative (anions)
strong w/o presence of water but weak in aqueous solution (because water has + and - charges)
hydrogen bonds - ANS relatively weak. form when hyd. atom w/ partial positive is attracted
to atom w/ partial negative
4 main classes of biological molecules - ANS proteins
nucleic acids
2
BIO 121 Exam 1 Questions and Answers
100% Pass
True or False: nothing in science is proven - ANS True
Theory - ANS well substained explanation of something in the natural world that can
incorporate facts, laws, hypothesises etc
Gravitational Theory - ANS gravity is factual, there is a vast body of knowledge that explains
the facts of gravity
facts, inferences, laws, tested hypothesis
Evolutionary theory - ANS facts. evolution itself is factual. inferences, laws
evolution accounts for the unity and diversity of life
emergent properties - ANS new properties emerge at each level in biological hierarchy
result from arrangement of parts in an ecosystem/community
number of protons determines: - ANS what chemical element it is
isotopes - ANS same element, different number of neutrons
valence shells - ANS determine chemical properties
1
, ©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
lose, gain, or share to fill valence shell
how many electrons are needed to fill a valence shell? - ANS 8
except H and He (2)
silicon dioxide - ANS sand, glass
atoms are joined by chemical bonds to form: - ANS compounds
chemical formula - ANS gives type and relative number of atoms in sequence
covalent bonds - ANS outer shells of atoms have joined. strong and stable. atoms share
valence electrons
Nonpolar - ANS if electrons are shared equally
polar - ANS if electrons are not shared equally (H2O)
if one element is more electronegative than the other
ionic bonds - ANS form between positive (cations) and negative (anions)
strong w/o presence of water but weak in aqueous solution (because water has + and - charges)
hydrogen bonds - ANS relatively weak. form when hyd. atom w/ partial positive is attracted
to atom w/ partial negative
4 main classes of biological molecules - ANS proteins
nucleic acids
2
