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UA BSC 108 Exam 1 Questions With
100% Correct Answers

Understand and be able to list the levels of biological organization
and how they are organized in a hierarchy from simplest to more
complex. - Correct Answer-atoms, molecules, cells, tissues, organs,
organ systems, organisms, populations, communities, ecosystems,
biosphere


Be able to list the properties common to all living things. - Correct
Answer-Complex yet orderly, regulation, growth and development,
energy processing (metabolism), response to the environment,
reproduction (DNA), evolution, cells.


Be able to define homeostasis. - Correct Answer-The process of
keeping internal conditions such as temperature constant in an
organism.


Be able to list the three domains of living organisms and the basic
type of organisms each domain contains. - Correct Answer-Eukarya,
Archaea, Bacteria; prokaryotic or eukaryotic


Understand and be able to list the steps of the scientific method using
an example experiment. - Correct Answer-Observation, questions,
hypothesis, prediction, experiment. Ex. Experiment: Rats and caffeine.
Observation: Rats operate for 12 hours of the day with no caffeine.

,Question: How many hours a day would rats operate with caffeine?
Hypothesis: Rats will function for more hours of the day with caffeine.
Prediction: Rats will operate for 14 hours of the day instead of 12
hours of the day with caffeine. Experiment: Create a control group
(rats w/ no caffeine), experimental group (rats w/ caffeine) and
document.


Know what data are and be able to give an example of a hypothesis,
an experimental variable, and a control group. - Correct Answer-
Hypothesis: a proposed explanation for a set of observations.
Experimental variable: the independent variable that is manipulated
by the researcher to determine its relationship to or influence upon
some outcome or dependent variable. Control group: the group in an
experiment that receives no treatment.


How do hypotheses differ from theories? Be able to give an example
of a scientific theory. - Correct Answer-Hypothesis: a proposed
explanation for a set of observations. Scientific Theory: a widely
accepted explanatory idea that is much broader in scope than a
hypothesis and is a comprehensive and well-substantiated
explanation. I.e. Darwin's Theory of Evolution


What is an element? - Correct Answer-A substance that can't be
broken down into another substance by ordinary means.

, Know the three components of an atom and their properties. - Correct
Answer-1. Protons have a positive charge. 2. Neutrons are neutral. 3.
Electrons have a negative charge.


What do electrons do? - Correct Answer-Electrons orbit around the
protons and neutrons in the nucleus of the atom.


What is an element's atomic number? What is an element's atomic
mass? - Correct Answer-An element's atomic number is its' number of
protons or electrons. An element's atomic mass is its' number of
protons plus its number of neutrons.


How can an atom become an ion? - Correct Answer-By gaining or
losing one or more electrons; an atom can donate an electron to
another atom or accept an electron from another atom to become an
ion.


What forms an ionic bond? - Correct Answer-Two ions (positive and
negative) that attract each other.


How do two atoms form a molecule? - Correct Answer-Two atoms can
share a pair of electrons in a covalent bond to form a molecule.


How are new substances made? - Correct Answer-Chemical reactions
make and break chemical bonds to form new substances.

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