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Item IE074002: Plants compete for water, space, and light when those resources are limited.

Which of the following statements about competition between plants is TRUE?

  1. Plants compete for water when it is limited, but they do not compete for space when it is limited.
  2. Plants compete for water and space when they are limited, but they do not compete for light when it is limited.
  3. Plants compete for water, space, and light when they are limited.
  4. Plants do not compete for any resource, even when it is limited.
Distribution of responses
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 3295
6–8
n = 792
9–12
n = 2490
Male
n = 1544
Female
n = 1675
English
n = 2934
Other
n = 255
A. Plants compete for water when it is limited, but they do not compete for space when it is limited. 5% 7% 4% 7% 4% 5% 3%
B. Plants compete for water and space when they are limited, but they do not compete for light when it is limited. 12% 10% 12% 11% 12% 11% 16%
C. Plants compete for water, space, and light when they are limited. 62% 54% 64% 62% 62% 63% 55%
D. Plants do not compete for any resource, even when it is limited. 21% 29% 19% 21% 22% 21% 27%