MEDIUM
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What is primary and secondary gross productivity?

Important Questions on Ecosystems and Energy Flow

EASY
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
A grazing food chain cannot begin in the absence of
MEDIUM
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem

Choose the correct statements.

A) The total annul accounts of wet organic matter of the forest can be estimated with the annual net productivity amount of standing forest.
B) Ecosystems also exert direct physical influence that help to moderate regional and local weather.
C) Decline in pollinator activity could mean rising cost of pollination dependent fruits and vegetables.
D) Constanza and his colleagues have tried to put price tag on nature's life support services.

MEDIUM
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
Write any three differences between primary productivity and secondary productivity.
EASY
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
The annual net primary productivity of the whole biosphere is approximately _____ (dry weight) of organic matter.
EASY
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?
HARD
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
What do you mean by the energy stored in plant biomass?
EASY
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
Gross Primary Productivity - Respiratory losses = _____. (Net primary productivity/Net secondary productivity)
MEDIUM
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
What are the important roles played by predators in an ecosystem?
HARD
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
What is humification?
EASY
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
Among biotic components, the micro consumers are called _____ (scavengers/decomposers).
EASY
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
Describe productivity as a unit of ecosystem.
EASY
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
In an ecosystem the rate of production of organic matter during photosynthesis is termed as:
MEDIUM
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
What is gross primary productivity? In what unit is it expressed?
MEDIUM
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
What is correct for the Net primary productivity?
EASY
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
What is primary production?
MEDIUM
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
Study the following statements and select the correct ones:
I) In a thermally stratified lake, in winter, the upper layer is known as epilimnion.
II) Animals in a lake that are capable of swimming constitute neuston.
III) The natural interconnections of food chain forms a network called food web.
IV) Energy flow in an ecosystem is unidirectional.
EASY
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem

Match the trophic levels with their correct species examples in grassland ecosystem.

(a) Fourth trophic level (i) Crow
(b) Second trophic level (ii) Vulture
(c) First trophic level (iii) Rabbit
(d) Third trophic level (iv) Grass

Select the correct option.

EASY
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem

The rate of storage of organic matter which is NOT used by the consumer is ______.

EASY
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
Presence of plants arranged into well-defined vertical layers depending on their height can be seen best in:
MEDIUM
Biology>Ecology and Environment>Ecosystems and Energy Flow>Ecosystem
Vertical distribution of different species occupying different levels in a biotic community is known as: