BIO 133 Exam 1 Study Set
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+ [LATEST 2026-
2027] 100% GUARANTEED
PASS
Theory - CORRECT ANSWER-a broad statement that can spin off many, new, testable hypotheses
and is supported by a greater body of evidence
Model organism - CORRECT ANSWER-a species that is easy to grow in a lab and is suitable for
the question being investigated
Technology - CORRECT ANSWER-goal is to apply scientific knowledge for some specific purpose
Matter - CORRECT ANSWER-anything that takes up space and has mass
Element - CORRECT ANSWER-substance that can't be broken down to other substances by
chemical reactions
Compound - CORRECT ANSWER-substance that has 2 or more different elements combined in a
fixed ratio
,Essential elements - CORRECT ANSWER-elements an organism needs to live healthily and
reproduce
Trace elements - CORRECT ANSWER-elements an organism needs in small amounts
Atom - CORRECT ANSWER-smallest unit of matter that retains the properties of an element
Neutrons - CORRECT ANSWER-electrically neutral particle
Protons - CORRECT ANSWER-positively charged particle
Electrons - CORRECT ANSWER-negatively charged particle
Atomic nucleus - CORRECT ANSWER-dense core at the center of an atom, has protons and
neutrons
Dalton - CORRECT ANSWER-unit of measurement used for atoms and subatomic particles
Atomic number - CORRECT ANSWER-# of protons in an element
Mass number - CORRECT ANSWER-total # of protons and neutrons in an atom's nucleus
Atomic mass - CORRECT ANSWER-total mass of an atom
Isotopes - CORRECT ANSWER-atoms that have different #s of neutrons for the same element
Radioactive isotope - CORRECT ANSWER-one where the nucleus decays spontaneously
, Half-life - CORRECT ANSWER-time it takes for 50% of the parent isotope to decay
Radiometric dating - CORRECT ANSWER-used to measure ratio of different isotopes and
calculate how many years have passed since an organism was fossilized or a rock was formed
Energy - CORRECT ANSWER-capacity to cause change
Potential energy - CORRECT ANSWER-energy matter possesses because of its location or
structure
Electron shells - CORRECT ANSWER-level with a characteristic average distance from nucleus
and energy level
Valence electrons - CORRECT ANSWER-electrons in an atom's outermost shell
Valence shell - CORRECT ANSWER-the outermost electron shell in an atom
Orbital - CORRECT ANSWER-3-D space where an electron is found 90% of the time
Chemical bonds - CORRECT ANSWER-attractions holding atoms close together
Covalent bond - CORRECT ANSWER-strongest bond, sharing of a pair of valence e- by 2 atoms
Molecule - CORRECT ANSWER-2 or more atoms held together by covalent bonds
Single bond - CORRECT ANSWER-a pair of shared e-
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+ [LATEST 2026-
2027] 100% GUARANTEED
PASS
Theory - CORRECT ANSWER-a broad statement that can spin off many, new, testable hypotheses
and is supported by a greater body of evidence
Model organism - CORRECT ANSWER-a species that is easy to grow in a lab and is suitable for
the question being investigated
Technology - CORRECT ANSWER-goal is to apply scientific knowledge for some specific purpose
Matter - CORRECT ANSWER-anything that takes up space and has mass
Element - CORRECT ANSWER-substance that can't be broken down to other substances by
chemical reactions
Compound - CORRECT ANSWER-substance that has 2 or more different elements combined in a
fixed ratio
,Essential elements - CORRECT ANSWER-elements an organism needs to live healthily and
reproduce
Trace elements - CORRECT ANSWER-elements an organism needs in small amounts
Atom - CORRECT ANSWER-smallest unit of matter that retains the properties of an element
Neutrons - CORRECT ANSWER-electrically neutral particle
Protons - CORRECT ANSWER-positively charged particle
Electrons - CORRECT ANSWER-negatively charged particle
Atomic nucleus - CORRECT ANSWER-dense core at the center of an atom, has protons and
neutrons
Dalton - CORRECT ANSWER-unit of measurement used for atoms and subatomic particles
Atomic number - CORRECT ANSWER-# of protons in an element
Mass number - CORRECT ANSWER-total # of protons and neutrons in an atom's nucleus
Atomic mass - CORRECT ANSWER-total mass of an atom
Isotopes - CORRECT ANSWER-atoms that have different #s of neutrons for the same element
Radioactive isotope - CORRECT ANSWER-one where the nucleus decays spontaneously
, Half-life - CORRECT ANSWER-time it takes for 50% of the parent isotope to decay
Radiometric dating - CORRECT ANSWER-used to measure ratio of different isotopes and
calculate how many years have passed since an organism was fossilized or a rock was formed
Energy - CORRECT ANSWER-capacity to cause change
Potential energy - CORRECT ANSWER-energy matter possesses because of its location or
structure
Electron shells - CORRECT ANSWER-level with a characteristic average distance from nucleus
and energy level
Valence electrons - CORRECT ANSWER-electrons in an atom's outermost shell
Valence shell - CORRECT ANSWER-the outermost electron shell in an atom
Orbital - CORRECT ANSWER-3-D space where an electron is found 90% of the time
Chemical bonds - CORRECT ANSWER-attractions holding atoms close together
Covalent bond - CORRECT ANSWER-strongest bond, sharing of a pair of valence e- by 2 atoms
Molecule - CORRECT ANSWER-2 or more atoms held together by covalent bonds
Single bond - CORRECT ANSWER-a pair of shared e-
