1. Ecology Practice Test

2. Question #1
Which of the following are heterotrophs? Write in ALL that apply.
a) bacteria
b) mushrooms
c) plants
d) carbon dioxide and water

3. Question #2
If toxic soil leads to a lack of protein, which stage of the nitrogen cycle is not occurring?
a) N2  NH3
b) NH3  NO3
c) NO3  N2

4. Question #3
Which organisms convert inorganic materials into organic materials?
a) producers
b) consumers
c) decomposers
d) all heterotrophs

5. Question #4 They convert nitrate into protein a) producers
b) consumers
c) decomposing bacteria
d) non-decomposing bacteria

6. Question #5
There are 600 calories at the secondary consumer level. How many are at the producer level?
a) 6
b) 60
c) 600
d) 6,000
e) 60,000

7. Question #6
Which type of population growth results when the births and immigration equal the deaths and emigration?
a) exponential growth
b) population crash
c) logistic growth

8. Question #7 All organisms are a) heterotrophs b) producers
c) inorganic
d) organic
e) none of the above

9. Question #8 The purpose of the carbon cycle is to make and recycle
a) glucose
b) oxygen
c) protein
d) inorganic materials
e) none of the above

10. Question #9
What do the arrows in a food web represent?

11. Question #10
What do autotrophs provide heterotrophs with? Write in all possible answers.
a) oxygen
b) carbon dioxide
c) proteins
d) glucose

12. Question #11
Explain how the carbon cycle is involved in the greenhouse effect.

13. Answers
Answers
B C
B D
A A
A Energy Flow
E A, C, D