CAMPBELL BIOLOGY CHAPTER 2
PRACTICE TEST CORRECT 100%
Which of the following four statements, if any, is true regarding essential elements
and living organisms? - ANSWERAlthough all forms of life require iron, other
elements are required only by certain species.
Consider this statement: Concentrations of trace elements in an environment above
what is required by organisms generally have no effect on those organisms. Which
of the following is a valid response to this statement? - ANSWERFalse. Elevated
concentrations of trace elements such as chromium and phosphorus can
be toxic
Consider this statement: Oxygen is not a greenhouse gas; therefore, gases
containing oxygen—such as ozone, nitrous oxide, and carbon dioxide—are not
greenhouse gases either. Which of the following is a valid response to this
statement? - ANSWERFalse. Compounds can have emergent properties that are
very different from those of the elements that form them
There are __________ naturally occurring elements. (eText Concept 2.1) -
ANSWER92
Which of the following is a trace element? (eText Concept 2.1) - ANSWERcopper
What are the four most abundant elements found in living systems? (eText Concept
2.1) - ANSWERhydrogen, oxygen, nitrogen, and carbon
Why are radioactive isotopes useful in scientific research? (eText Concept 2.2) -
ANSWERbecause they can be used as tracers to follow particular atoms and
molecules through metabolic pathways
A neutral atom of chlorine has an atomic number of 17. It has __________ electrons
in its third shell. (eText Concept 2.2) - ANSWER7
The chemical characteristics or reactivity of an element depend mostly on the
__________. (eText Concept 2.2) - ANSWERnumber of electrons in its outermost
shell
Which of the following has negligible mass? (eText Concept 2.2) - ANSWERelectron
Which of the following subatomic particles has appreciable mass and lacks a
charge? (eText Concept 2.2) - ANSWERneutron
The number of protons in an uncharged atom __________. (eText Concept 2.2) -
ANSWERequals the number of electrons
PRACTICE TEST CORRECT 100%
Which of the following four statements, if any, is true regarding essential elements
and living organisms? - ANSWERAlthough all forms of life require iron, other
elements are required only by certain species.
Consider this statement: Concentrations of trace elements in an environment above
what is required by organisms generally have no effect on those organisms. Which
of the following is a valid response to this statement? - ANSWERFalse. Elevated
concentrations of trace elements such as chromium and phosphorus can
be toxic
Consider this statement: Oxygen is not a greenhouse gas; therefore, gases
containing oxygen—such as ozone, nitrous oxide, and carbon dioxide—are not
greenhouse gases either. Which of the following is a valid response to this
statement? - ANSWERFalse. Compounds can have emergent properties that are
very different from those of the elements that form them
There are __________ naturally occurring elements. (eText Concept 2.1) -
ANSWER92
Which of the following is a trace element? (eText Concept 2.1) - ANSWERcopper
What are the four most abundant elements found in living systems? (eText Concept
2.1) - ANSWERhydrogen, oxygen, nitrogen, and carbon
Why are radioactive isotopes useful in scientific research? (eText Concept 2.2) -
ANSWERbecause they can be used as tracers to follow particular atoms and
molecules through metabolic pathways
A neutral atom of chlorine has an atomic number of 17. It has __________ electrons
in its third shell. (eText Concept 2.2) - ANSWER7
The chemical characteristics or reactivity of an element depend mostly on the
__________. (eText Concept 2.2) - ANSWERnumber of electrons in its outermost
shell
Which of the following has negligible mass? (eText Concept 2.2) - ANSWERelectron
Which of the following subatomic particles has appreciable mass and lacks a
charge? (eText Concept 2.2) - ANSWERneutron
The number of protons in an uncharged atom __________. (eText Concept 2.2) -
ANSWERequals the number of electrons
