Ecosystem · Question 43

AIPMT 2014MatchingEasy📈 Topic in 38% papers+4−1

Match the following and select the correct option:

(a) (i), (b) (ii), (c) (iii), (d) (iv)
(a) (iii), (b) (ii), (c) (iv), (d) (i)
(a) (iv), (b) (i), (c) (iii), (d) (ii)
(a) (ii), (b) (i), (c) (iv), (d) (iii)

Answer

(4) (a) (ii), (b) (i), (c) (iv), (d) (iii)

Solution

(a) Earthworm feeds on dead organic matter (detritus) and breaks it into smaller particles detritivore (ii).

(b) Succession begins with the pioneer species that first invade a bare area (i).

(d) Population growth depends on natality (birth rate) (iii).

(a) (ii), (b) (i), (c) (iv), (d) (iii)

Answer: (4)

AIPMT 2014

Keep practising — Ecosystem

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

A Detritus, B Rock minerals, C Producer, D Litter fall
A Litter fall, B Producers, C Rock minerals, D Detritus
A Rock minerals, B Detritus, C Litter fall, D Producers
A Producers, B Litter fall, C Rock minerals, D Detritus

AIPMT 2014

If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain? Plant mice snake peacock

0.0002 J
0.002 J
0.2 J
0.02 J

AIPMT 2014

Natural reservoir of phosphorus is :

Fossils
Rock
Sea water
Animal bones

NEET 2013

Secondary productivity is rate of formation of new organic matter by :

Parasite
Decomposer
Producer
Consumers

NEET 2013

Which one of the following processes during decomposition is correctly described ?

Catabolism – Last step in the decomposition under fully anaerobic condition
Leaching – Water soluble inorganic nutrients rise to the top layers of soil
Fragmentation – Carried out by organisms such as earthworm
Humification – Leads to the accumulation of a dark coloured substance humus which undergoes microbial action at a very fast rate

NEET 2013

Which one of the following is a primary consumer in maize field ecosystem ?