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LT 1 Macro Invertebrates
Test Description: A review of macro invertebrates and how they can be used to assess stream quality.
Instructions: Answer all questions to get your test result.
1) All of the following are true about macros except:
A
They are too small to be seen with the unaided eye.
B
They have different tolerances to pollution.
C
They can be used to determine water quality.
D
They are easy to catch.
2) When calculating cumulative index value, Group One macros are multiplied by what factor?
A
4
B
2
C
1
D
3
3) When calculating cumulative index value, Group Three organisms are multiplied by what factor?
A
1
B
4
C
2
D
4
4) Calculate the cumulative index value for a sample with 2 types each of Group 1, 2, and 3 macros
A
11
B
13
C
15
D
10
5) Calculate a sample that contains 2 Group Ones, 4 Group Twos and 3 Group Threes
A
7
B
17
C
18
D
15
6) Calculate a macro sample with 2 Group 1's, 3 Group 2's and 3 Group 3's.
A
15
B
14
C
11
D
12
7) Leeches, worms, and snails all belong to which macro group?
A
none of the above
B
1
C
3
D
2
8) Group one macro invertebrates would be described as
A
partially tolerant to pollution
B
tolerant to pollution
C
none of the above
D
intolerant to pollution
9) When calculating cumulative index value, Group two macro invertebrates are multiplied by what value?
A
3
B
0
C
2
D
1
10) The term benthic means
A
cold
B
top
C
bottom
D
warm
*select an answer for all questions
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