Most animals that in deep oceanic water are

• primary consumers

• secondary consumers

• tertiary consumers

• tertiary consumers

Deficiency symptoms of nitrogen and potassium are visible first in

• senescent leaves

• young leaves

• roots

• roots

Which one of the following is not a gaseous biogeochemical cycle in ecosystem?

• Sulphur cycle

• Phosphorus cycle

• Nitrogen cycle

• Nitrogen cycle

Identify the possible link A in the following food chain
Green plant Insect  Frog  A  Eagle

• rabbit

• wolf

• cobra

• cobra

Given below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels?

• Level PC is insects and level SC is small insectivorous birds

• Level PP is phytoplanktons in sea and Whale on top level TC

• Level on PP is pipal trees and the level SC is sheep

• Level on PP is pipal trees and the level SC is sheep

Which one of the following is not a functional unit of an ecosystem?

• Energy flow

• Decomposition

• Productivity

• Productivity

The upright pyramid of number is absent in

• pond

• forest

• lake

• lake

The rate of formation of new organic matter by rabbit in a grassland is called

• net productivity

• secondary productivity

• net primary productivity

• net primary productivity

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
  Rock Minerals	Detritus	Litter fall	Producers

• A	B	C	D
  Litter fall	Producers	Rock minerals	Detritus

• A	B	C	D
  Detritus	Rock minerals	Producer	Litter fall

• A	B	C	D
  Detritus	Rock minerals	Producer	Litter fall

20.

Given below is the representation of the extent of global diversity of invertebrates. What groups the four portions (A - D) represent respectively?

• A	B	C	D
  Insects	Crustaceans	other animal group	Molluscs

• A	B	C	D
  Crustacean	Insects	Molluscs	other animal groups

• A	B	C	D
  Molluscs	Other animal groups	Crustaceans	Insects

• A	B	C	D
  Molluscs	Other animal groups	Crustaceans	Insects