Biology – Class 12 Mock Test 9

10%

Question 1 of 10

1. Which of the following is the lowest in number, if plants, grasshopper, birds, and lion are the components of an ecosystem?

Grasshopper

Plants

Lion

Birds

Question 1 of 10

Question 2 of 10

2. From where do autotrophs obtain energy?

Sunlight

Ecosystem

Heterotrophs

Zooplankton

Question 2 of 10

Question 3 of 10

3. What is the rate of production of new organic matter by heterotrophic organisms (consumers) called?

Net primary productivity

Secondary productivity

Primary productivity

Gross primary productivity

Question 3 of 10

Question 4 of 10

4. What does the red line in the given figure indicate?

S-shaped growth curve

Logistic growth

Sigmoidal growth

Exponential growth

Question 4 of 10

Question 5 of 10

5. What is the missing level of the organization?

Phytoplankton → Zooplankton → ? → Man

Lion

Fungi

Aquatic plants

Fishes

Question 5 of 10

Question 6 of 10

6. Which one of the following represents a pyramid of biomass?

A and B

A and D

B and C

A and C

Question 6 of 10

Question 7 of 10

7. Which organisms do not have any fixed trophic levels?

Carnivores

Autotrophs

Decomposers

Parasites

Question 7 of 10

Question 8 of 10

8. Which is the third phase in the logistic growth curve of the population?

Negative phase

Lag phase

Deacceleration phase

Log phase

Question 8 of 10

Question 9 of 10

9. Which organism has become extinct in the Galapagos Islands?

Goats

Birds

Herbs

Abingdon tortoise

Question 9 of 10

Question 10 of 10

10. What is a frog that feeds on insects example of?

Tertiary consumer

Decomposer

Primary consumer

Secondary consumer

Question 10 of 10