Question 15 - High School Biology Practice Test for the STAAR test

Three students conduct studies as listed in the attached document. Which of these students is studying an ecosystem?

Student 1
Species of birds present
Species of trees present
Precipitation levels

Student 2
Number of adult eagles present
Number of eagle nests present
Number of eagle chicks hatched

Student 3
Number of eagles present
Levels of fish populations
Numbers of competing species present

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