Free Ecosystem (Daily Quiz: 5) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks.

	A	B	C	D
(a)	Rock minerals	Detritus	Litter fall	Producers
(b)	Litter fall	Producers	Rock minerals	Detritus
(c)	Detritus	Rock minerals	Producers	Litter fall
(d)	Producers	Litter fall	Rock minerals	Detritus

(a) (a)

(b) (b)

(c) (c)

(d) (d)

Question-2

Consider the following statements concerning food chains.

1. Removal of 80% tigers from an area resulted in greatly increased growth of vegetation.
2. Removal of most of the carnivores resulted in an increased population of deers.
3. The length of food chains is generally limited to 3-4 trophic levels due to energy loss.
4. The length of food chains may vary from 2 to 8 trophic levels.

Which two of the above statements are correct?

(a) A, B

(b) A, D

(c) B, C

(d) C, D

Question-3

In secondary succession the species that invades an area depend on

(a) Water availability

(b) Soil condition

(c) Seed or propagules present

(d) All of these

Question-4

Which of the following representations shows the pyramid of numbers in a forest ecosystem?

(a) A

(b) D

(c) B

(d) C

Question-5

The biomass available for consumption by the herbivores and the decomposers is called

(a) standing crop

(b) secondary productivity

(c) net primary productivity

(d) gross primary productivity