BIOL 189 UNLV STUDY GUIDE 2026
QUESTIONS ANSWERS GRADED A+
⩥Atom.
Answer: Smallest unit of matter. Consists of varying numbers of
protons, neutrons, and electrons.
⩥Bacteria.
Answer: Single-celled organisms that lack a nucleus; prokaryotes
⩥Biology.
Answer: The scientific study of life.
⩥Cell.
Answer: -Smallest unit of life.
-All start out life with a plasma membrane, cytosol, and DNA.
⩥Community.
Answer: All populations of all species living in a defined area.
⩥Control group.
,Answer: In an experiment, a group of individuals identical to an
experimental group except for the variable under investigation.
⩥Controlled variable.
Answer: Factor in an experiment that scientist purposely keep the same
⩥Critical thinking.
Answer: The act of evaluating information before accepting it.
⩥Dependent variable.
Answer: The outcome factor; the variable that may change in response
to manipulations of the independent variable.
⩥DNA.
Answer: -Deoxyribonucleic acid.
-Double-stranded nucleic acid that consists of deoxyribose-containing
nucleotides.
-Carries hereditary information.
⩥Experiment.
Answer: Statement, based on a hypothesis, about a condition that should
reasonably occur if the hypothesis is correct.
,⩥Experimental group.
Answer: -In an experiment, a group of individuals who have a certain
characteristic or receive a certain treatment. -Tested side by side with a
control group.
⩥Fungi.
Answer: -Plural, fungi.
-Single-celled or multicelled eukaryotic
-Consumer that breaks down material outside itself, then absorbs
nutrients released from the breakdown.
⩥Genus.
Answer: -Plural, genera.
-A group of species that share a unique set of traits.
-First part of a species name.
⩥Homeostasis.
Answer: Process in which cells and multicelled organisms keeps their
internal conditions within tolerable ranges by sensing and responding
appropriately to change.
⩥Independent variable.
Answer: The experimental factor that is manipulated; the variable whose
effect is being studied.
, ⩥Inheritance.
Answer: Transmission of DNA to offspring.
⩥Law of nature.
Answer: Generalization describing a consistent natural phenomenon that
has an incomplete scientific explanation.
⩥Model.
Answer: Analogous system in an experiment; tested in place of another
subject.
⩥Molecule.
Answer: Two or more atoms joined by chemical bonds.
⩥Nutrient.
Answer: A substance that an organism must acquire from the
environment to support growth and survival.
⩥Organ.
Answer: In multicelled organisms, a structure that consists of tissues
engaged in a collective task.
QUESTIONS ANSWERS GRADED A+
⩥Atom.
Answer: Smallest unit of matter. Consists of varying numbers of
protons, neutrons, and electrons.
⩥Bacteria.
Answer: Single-celled organisms that lack a nucleus; prokaryotes
⩥Biology.
Answer: The scientific study of life.
⩥Cell.
Answer: -Smallest unit of life.
-All start out life with a plasma membrane, cytosol, and DNA.
⩥Community.
Answer: All populations of all species living in a defined area.
⩥Control group.
,Answer: In an experiment, a group of individuals identical to an
experimental group except for the variable under investigation.
⩥Controlled variable.
Answer: Factor in an experiment that scientist purposely keep the same
⩥Critical thinking.
Answer: The act of evaluating information before accepting it.
⩥Dependent variable.
Answer: The outcome factor; the variable that may change in response
to manipulations of the independent variable.
⩥DNA.
Answer: -Deoxyribonucleic acid.
-Double-stranded nucleic acid that consists of deoxyribose-containing
nucleotides.
-Carries hereditary information.
⩥Experiment.
Answer: Statement, based on a hypothesis, about a condition that should
reasonably occur if the hypothesis is correct.
,⩥Experimental group.
Answer: -In an experiment, a group of individuals who have a certain
characteristic or receive a certain treatment. -Tested side by side with a
control group.
⩥Fungi.
Answer: -Plural, fungi.
-Single-celled or multicelled eukaryotic
-Consumer that breaks down material outside itself, then absorbs
nutrients released from the breakdown.
⩥Genus.
Answer: -Plural, genera.
-A group of species that share a unique set of traits.
-First part of a species name.
⩥Homeostasis.
Answer: Process in which cells and multicelled organisms keeps their
internal conditions within tolerable ranges by sensing and responding
appropriately to change.
⩥Independent variable.
Answer: The experimental factor that is manipulated; the variable whose
effect is being studied.
, ⩥Inheritance.
Answer: Transmission of DNA to offspring.
⩥Law of nature.
Answer: Generalization describing a consistent natural phenomenon that
has an incomplete scientific explanation.
⩥Model.
Answer: Analogous system in an experiment; tested in place of another
subject.
⩥Molecule.
Answer: Two or more atoms joined by chemical bonds.
⩥Nutrient.
Answer: A substance that an organism must acquire from the
environment to support growth and survival.
⩥Organ.
Answer: In multicelled organisms, a structure that consists of tissues
engaged in a collective task.
