Test Bank - Campbell Biology in Focus, 2nd AP® Edition (Urry, 2017) Chapter 2 - Test bank for Campbell Biology, Cdn. Ed., 2e (Reece et al.)

11/16/23, 2:50 PM Chapter 2 - Test bank for Campbell Biology, Cdn. Ed., 2e (Reece et al.)




Campbell Biology, Cdn. Ed., 2e (Reece et al.)
Chapter 2 The Chemical Context of Life

1) About 25 of the 92 natural elements are known to be essential to life. Which four of these 25
elements make up approximately 96% of living matter?
A) carbon, sodium, hydrogen, nitrogen
B) carbon, oxygen, phosphorus, hydrogen
C) oxygen, hydrogen, calcium, nitrogen
D) carbon, hydrogen, nitrogen, oxygen
E) carbon, oxygen, nitrogen, calcium
Answer: D
Type: MC
Topic: Concept 2.1
Skill: Knowledge/Comprehension

2) Trace elements are those required by an organism in only minute quantities. Which of the
following is a trace element that is required by humans and other vertebrates, but not by other
organisms such as bacteria or plants?
A) nitrogen
B) calcium
C) iodine
D) sodium
E) phosphorus
Answer: C
Type: MC
Topic: Concept 2.1
Skill: Knowledge/Comprehension

3) Which of the following statements is false?
A) Carbon, hydrogen, oxygen, and nitrogen are the most abundant elements of living matter.
B) Some trace elements are very abundant on Earth.
C) Virtually all organisms require the same elements in the same quantities.
D) Iron is an example of an element needed by all organisms.
E) Other than some trace elements, animals are mostly made up of the same elements as plants,
in similar proportions.
Answer: C
Type: MC
Topic: Concept 2.1
Skill: Application/Analysis




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