WEEK 11

Week 11 — Short Practice Quiz

Based on your uploaded assignments.

1. Ludwig’s ratchet predicts

a. decreasing harvesting rate
b. constant harvesting rate
c. increasing harvesting rate
d. fluctuating harvesting rate

2. Which of these is correct?

a. R + G= M + F
b. R + M = G + F
c. R + F = M + G
d. R + G + M + F = 0

3. A deciduous forest in Madhya Pradesh was converted to a mine. After mining, pits were filled with soil and deciduous forest species were planted again. This is an example of

a. recovery
b. restoration
c. enhancement
d. replacement

4. A deciduous forest in Madhya Pradesh was converted to a mine. After mining, pits were filled with water and a lake was created, now visited by migratory birds. This is an example of

a. recovery
b. restoration
c. enhancement
d. replacement

5. A root zone treatment plant is an example of

a. phytoremediation
b. biological control
c. biomagnification
d. bioaccumulation

6. A pest population is called controlled when

a. it is not increasing
b. it is decreasing
c. it is not causing any economic damage
d. it is not causing excessive economic damage

7. Which of these is not an impact of toxic chemicals?

a. lethal effects
b. sub-lethal effects
c. reduction of existing stressors
d. reduced fecundity

8. Which of these is correct?

a. The maximum sustainable yield is near the beginning of the sigmoidal curve.
b. The maximum sustainable yield is near the mid-point of the sigmoidal curve.
c. The maximum sustainable yield is near the end of the sigmoidal curve.
d. None of these.

9. The impact of El Niño on fishery collapse in Peru is explained by

a. match hypothesis
b. mismatch hypothesis
c. match-mismatch hypothesis
d. none of these

10. A pest population is called uncontrolled when

a. it is increasing
b. it is not decreasing
c. it is causing some economic damage
d. it is causing excessive economic damage