Multiple Choice
Which term describes physical and environmental factors that affect a population regardless of its size?
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50. Population Ecology
Introduction to Population Ecology
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Which of the following choices is an expression of a population density?
A
255 dogfish sharks
B
100 sea stars, barnacles, and mussels per 25 m2 of a tide pool
C
The total number of sturgeon per cubic meter in San Francisco Bay and in Tomales Bay
D
The total dry mass of trout in a lake
E
The number of Paramecium caudatum in a 250-mL solution in a glass flask
Verified step by step guidance1
Understand the concept of population density, which is defined as the number of individuals of a species per unit area or volume.
Review each option to determine if it provides a measure of individuals per unit area or volume.
Option 1: '255 dogfish sharks' does not specify an area or volume, so it is not an expression of population density.
Option 2: '100 sea stars, barnacles, and mussels per 25 m² of a tide pool' provides a number of individuals per unit area, which is an expression of population density.
Option 3: 'The total number of sturgeon per cubic meter in San Francisco Bay and in Tomales Bay' specifies a number per unit volume, which is an expression of population density.
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Introduction to Population Ecology practice set
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