Factors Affecting Productivity

Q.

Why are crop fields known as artificial ecosystems?

Q.

How does productivity increase in terrestrial ecosystems?

Q.

Primary productivity varies from ecosystem to ecosystem. Explain.

Q. Primary productivity depends on all of the given factors, except:

1. Plant species inhabiting a particular area
2. A variety of environmental factors
3. Photosynthetic capacity of plants
4. Various species of primary consumers

Q. Which part of the world has high density of organism?

1. Deciduous forest
2. Grasslands
3. Tropical rain forest
4. Savannahs

Q. Match column I with column II and select the correct option.

Column I	Column II
A. Earthworm	1. Pioneer species
B. Ecological succession	2. Detritivore
C. Ecosystem service	3. Pollination

1. A – 1, B – 2, C - 3
2. A – 1, B – 3, C - 2
3. A – 3, B – 2, C - 1
4. A – 2, B – 1, C- 3

Q. Which of the following factor(s) affect productivity of an ecosystem?

1. Resource availability
2. Tertiary consumers
3. Presence of architectural species
4. Diversity of ecosystem

Q. Pyramid of energy in a river ecosystem is always

1. upright
2. inverted
3. declining
4. (a) and (b) above.

Q.

The energy within an ecosystem is fixed and never changes.

1. True
2. False

Q.

explain the relationship between biotic potential and environment resistant

Q. Fill in the blank:
In aquatic ecosystems, the limiting factor for productivity is ________.

Q. Magnitude of primary productivity is affected by:

1. Temperature, availability of nutrients
2. Solar radiation available, availability of nutrients
3. Photosynthetic capacity of producers
4. All of these

Q. Which one of the following ecosystem types have the highest annual net primary productivity?

1. Tropical rain forest
2. Tropical deciduous forest
3. Temperate deciduous forest
4. Temperate evergreen forest

Q. Primary productivity depends on all of the given factors, except:

1. Plant species inhabiting a particular area
2. A variety of environmental factors
3. Photosynthetic capacity of plants
4. Various species of primary consumers

Q. Sunlight is present for only a short span of time in

1. Polar regions
2. Subtropical regions
3. Desert regions
4. Himalayan region

Q. Why are tropical deciduous forests located in the tropical zone?

Q. Which of the following factor(s) affect productivity of an ecosystem?

1. Resource availability
2. Tertiary consumers
3. Presence of architectural species
4. Diversity of ecosystem

Q. Most of the photosynthesis (80%) which takes place on this earth is carried out by

1. Green plants on land
2. Algae present in ocean water
3. Algae present in fresh water
4. Both B and C

Q. Which of the following factor(s) affect productivity of an ecosystem?

1. Resource availability
2. Tertiary consumers
3. Presence of architectural species
4. Diversity of ecosystem

Q. Assertion :Secondary succession always involves a predictable sequence of species and ends up with the same climax community as existed prior to the disturbance. Reason: A pond cannot be considered as a self-sustained ecosystem as it does not possess all the structural and functional components which work as a unit in an ecosystem.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Is it true that there is more solar energy available in the tropics? Explain briefly.

Q. Primary productivity of the ecosystem is most often limited by

1. Nitrogen
2. Oxygen
3. Solar radiation
4. Consumers

Q. Primary productivity can be measured by

1. Harvest method
2. Chlorophyll content
3. Oxygen given out
4. All of the above

Q. Which of the following factor(s) affect productivity of an ecosystem?

1. Resource availability
2. Tertiary consumers
3. Presence of architectural species
4. Diversity of ecosystem

Q. Productivity in an ecosystem can be influenced by which of the following factors

1. Standing crop biomass
2. Availability of resources
3. Species diversity
4. Number of consumers

Q. what are the richest underwater forest Eco systems

Q. Assertion :Primary productivity is shown by green plants only. Reason: Primary productivity is also shown by chemosynthesizers.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Both Assertion and Reason are incorrect.

Q.

mr. galgotia eats curd / yoghurt , in this case which tropic level he occupy ?

Q. Productivity in an ecosystem can be influenced by which of the following factors

1. Standing crop biomass
2. Availability of resources
3. Species diversity
4. Number of consumers

Q. Which of the following factor(s) affect productivity of an ecosystem?

1. Resource availability
2. Tertiary consumers
3. Presence of architectural species
4. Diversity of ecosystem