1382 + Interview Questions in ECOSYSTEM IN GENERAL AWARENESS Page 3 InterviewSolution

101.	Distinguish between grazing and detritus food chain. Name the type of food chain helps in the flow of major fraction of energy through aquatic ecosystem.
Answer» The food chain start with producers are called grazing food chain. It start with dead organic matters is called detritus food chain. In an aquatic ecosystem, major fraction of energy flow occurs through GFC.

Discussion

102.	Distinguish between Grazing food chain and Detritus food chain.
Answer» 1. Grazing food chain It starts with producers. In aquatic ecosystem major fraction of energy flow take place through GFC than DFC. 2. Detritus food chain It starts with detritus. In terrestrial ecosystem major fraction of energy flow take place through DFC than GFC.

102.

Distinguish between Grazing food chain and Detritus food chain.

Answer»

1. Grazing food chain

It starts with producers. In aquatic ecosystem major fraction of energy flow take place through GFC than DFC.

2. Detritus food chain

It starts with detritus. In terrestrial ecosystem major fraction of energy flow take place through DFC than GFC.

Discussion

103.	Resarchers like Robert Constanza et.al.,have put an average price tag of US $.........trillion a year on the fundamental ecological services.A. 33B. 50C. 6D. 10
Answer» Correct Answer - A

Discussion

104.	In most ecosystems, all the pyramids are upright. But there are exceptions to this generalisation.1. Give any of the cases where pyramid of number and biomass becomes inverted.2. What is detritus food chain?
Answer» 1. The pyramid of number in a tree ecosystem is inverted. The primary producer tree is a single unit. The consumers like insects, small birds & large birds are the primary consumers secondary consumers &territory consumers respectively. Thus the no. of consumer in tree ecosystem is more than that of the producer. The pyramid of biomass in sea is inverted because the biomass of shes (Consumers) exceeds that of phytoplankton (producer). 2. Food chain starts with detritus called as detritus food chain.

104.

In most ecosystems, all the pyramids are upright. But there are exceptions to this generalisation.1. Give any of the cases where pyramid of number and biomass becomes inverted.2. What is detritus food chain?

Answer»

1. The pyramid of number in a tree ecosystem is inverted. The primary producer tree is a single unit. The consumers like insects, small birds & large birds are the primary consumers secondary consumers &territory consumers respectively.

Thus the no. of consumer in tree ecosystem is more than that of the producer. The pyramid of biomass in sea is inverted because the biomass of shes (Consumers) exceeds that of phytoplankton (producer).

2. Food chain starts with detritus called as detritus food chain.

Discussion

105.	The average price tag of US is 22 trillion US dollars a year.1. What does this data indicate?2. How is it related to GNP?'(Gross National Production)3. Which is the most price lagged ecosystem service in nature?
Answer» 1. Ecosystem are the base of wide range of economic, environmental and aesthetic goods and services. The products of ecosystem process are named as ecosystem services. These services are usually taken for granted because they are free. Researches have tried to put prize tags on nature’s life support services in order to understand the values of services provided by nature. 2. Gross national production is the value of human resources and services of a particular country. It is only half the value of ecosystem services. 3. Soil creation is the most prize tagged ecosystem service.

105.

The average price tag of US is 22 trillion US dollars a year.1. What does this data indicate?2. How is it related to GNP?'(Gross National Production)3. Which is the most price lagged ecosystem service in nature?

Answer»

1. Ecosystem are the base of wide range of economic, environmental and aesthetic goods and services. The products of ecosystem process are named as ecosystem services.

These services are usually taken for granted because they are free. Researches have tried to put prize tags on nature’s life support services in order to understand the values of services provided by nature.

2. Gross national production is the value of human resources and services of a particular country. It is only half the value of ecosystem services.

3. Soil creation is the most prize tagged ecosystem service.

Discussion

106.	Robert Constanza estimated price of fundamental ecosystem services areA. US `$` 33 trillionB. US `$` 13 trillionC. US `$` 50 trillionD. US `$` 60 trillion
Answer» Correct Answer - A

Discussion

107.	If decomposition not occur in nature huge amount of detritus of plants and animals may fill our ecosystems, it is seriously harm to living organisms of our environment1. Define decomposition2. Give the steps3. Decomposers are known as scavengers of earth”. Justify
Answer» 1. Breaking down of complex organic matter into simple inorganic substance like CO₂, H₂O and Nutrients is called decomposition. 2. Decomposition steps are Fragmentation – It is the breaking down of detritus into smaller particle by the detritivores like earthworm. Leaching – Precipitation of water soluble or inorganic nutrient into soil horizon. Catabolism – It is the degradation of detritus into simple inorganic substances by the action of micro organism. Humification – It is the accumulation of dark coloured amorphous substance called humus. Humus serve as the reservoir of nutrients. Mineralization – The degradation of humus & release of nutrients from it by microbes is called mineralization. 3. Decomposers split the complex detritus into simple inorganic compounds while doing so they also bring about nutrient cycling. The degradation of detritus into simple organic substances by micro organism involves catabolic process. Without micro organism the earth would have been filled with dead organisms.

107.

If decomposition not occur in nature huge amount of detritus of plants and animals may fill our ecosystems, it is seriously harm to living organisms of our environment1. Define decomposition2. Give the steps3. Decomposers are known as scavengers of earth”. Justify

Answer»

1. Breaking down of complex organic matter into simple inorganic substance like CO₂, H₂O and Nutrients is called decomposition.

2. Decomposition steps are

Fragmentation – It is the breaking down of detritus into smaller particle by the detritivores like earthworm.
Leaching – Precipitation of water soluble or inorganic nutrient into soil horizon.
Catabolism – It is the degradation of detritus into simple inorganic substances by the action of micro organism.
Humification – It is the accumulation of dark coloured amorphous substance called humus. Humus serve as the reservoir of nutrients.
Mineralization – The degradation of humus & release of nutrients from it by microbes is called mineralization.

3. Decomposers split the complex detritus into simple inorganic compounds while doing so they also bring about nutrient cycling. The degradation of detritus into simple organic substances by micro organism involves catabolic process. Without micro organism the earth would have been filled with dead organisms.

Discussion

108.	Decomposition is the breakdown of complex organic matter into inorganic substances like CO2 , Water, etc.1. Identify the gas which is most essential for decomposition.2. Find out any two conditions which inhibit decomposition.
Answer» 1. Oxygen 2. Low temperature, Anaerobiosis.

108.

Decomposition is the breakdown of complex organic matter into inorganic substances like CO2 , Water, etc.1. Identify the gas which is most essential for decomposition.2. Find out any two conditions which inhibit decomposition.

Answer»

1. Oxygen

2. Low temperature, Anaerobiosis.

Discussion

109.	Robert Constanza and his colleagues put price tags on nature’s life-support services. Price tag of US $ 33 trillion a year1. What is meant by, ecosystem services? Give example.2. Which is the most price lagged ecosystem service in nature?
Answer» 1. The product ecosystem process Generate fertile soil Pollinate crops 2. Soil creation is the most prize tagged ecosystem service.

109.

Robert Constanza and his colleagues put price tags on nature’s life-support services. Price tag of US $ 33 trillion a year1. What is meant by, ecosystem services? Give example.2. Which is the most price lagged ecosystem service in nature?

Answer»

1. The product ecosystem process

Generate fertile soil
Pollinate crops

2. Soil creation is the most prize tagged ecosystem service.

Discussion

110.	Assertion: Low temperature and anaerobiosis inhibit decomposition resulting in build up of organic materials Reason:Decomposition is largely an oxygen requiring process.A. If both assertion and reason are true and the reason is a correct explanation of the assertion.B. If both assertion and reason are true but reason is not a correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false.
Answer» Correct Answer - A Low temperature and anaerobiosis inhibit decomposition resulting in building of organic materials because decomposition is largely an oxygen requiring process.

Discussion

111.	Decomposition is largely an oxygen requiring process. Rate of decomposition depend upon many factors.1. What are the factors influence the rate of decomposition2. Explain it.
Answer» 1. The factors influencing the rate of decomposition are: Chemical nature of detritus Climatic condition (temperature and soil moistures) 2. Detritus which is rich in N₂ and water soluble substances like sugar decompose quickly than detritus containing lignin and chitin. Warm and moist environment favour decomposition whereas low temperature and anaerobic condition inhibit decomposition.

111.

Decomposition is largely an oxygen requiring process. Rate of decomposition depend upon many factors.1. What are the factors influence the rate of decomposition2. Explain it.

Answer»

1. The factors influencing the rate of decomposition are:

Chemical nature of detritus
Climatic condition (temperature and soil moistures)

2. Detritus which is rich in N₂ and water soluble substances like sugar decompose quickly than detritus containing lignin and chitin.

Warm and moist environment favour decomposition whereas low temperature and anaerobic condition inhibit decomposition.

Discussion

112.	“Decomposition is an oxygen requiring process” Comment.
Answer» Detritus is rich in nitrogen and sugars. For oxidation of nitrogen and sugars oxygen is required by a class of aerobic microbes.

Discussion

113.	Which of the following statement regarding decomposition is falseA. Warm and most enviroment favours decompositionB. Decomposition rate is slower if detritus is rich in chitin and ligninC. Earthworm is a detritivoreD. Precipitation of soluble inorganic nutrients into the soil horizon as unavailable salt is called mineralisation
Answer» Correct Answer - D

Discussion

114.	Among the following where do you think the process of decomposition would be the fastest?A. Tropical rain forestB. AntarcticC. Dry and regionD. Alpine region
Answer» Correct Answer - A

Discussion

115.	In a particular climatic condition, decomposition rate is slower if:A. Detritus is rich in nitrogenB. Detritus is rich in humusC. Detritus is rich in sugarsD. Detritus is rich in lignin and chitin
Answer» Correct Answer - D

Discussion

116.	In a particular climatic condition, decomposition rate is slower if detritus isA. nitrogenB. humusC. lignin and chitinD. water soluble substances
Answer» Correct Answer - D

Discussion

117.	Breakdown of detritus into smaller particles by earthworm is a process calledA. HumificatioinB. FragmentationC. MineralisationD. Catabolism
Answer» Correct Answer - B Breakdown of detritus into smaller parties by earth worm is a process called fragmentation.

Discussion

118.	The process of mineralisation by micro organisms helps in the release of:a. inorganic nutrients from humusb. both organic and inorganic nutrients from detritusc. organic nutrients from humusd. inorganic nutrients from detritus and formation of humus.
Answer» a. inorganic nutrients from humus

Discussion

119.	Decomposition rate is slow if detritus is rich inA. NitrogenB. HumusC. SugarsD. Lignin and Chitin
Answer» Correct Answer - D Decomposition rate is slow if detritus is rich in lignin and chitin

Discussion

120.	Most important climatic factors that regulate the rate of decomposition areA. Temperature and soil moistureB. Soil `pH` and aerationC. Aeration and temparatureD. Moisture and Soil `pH`
Answer» Correct Answer - A

Discussion

121.	Read the following statements and find out incorrect statements(s)A. In a particular climatic condition, decomposition rate is slower if detritus is rich nitrogen and water soluble compounds like sugars.B. Rate of decomposition is quicker if detritus is rich in lignin and chitin.C. Warm and moist environment inhibit decomposition .D. All of the above
Answer» Correct Answer - D In a particular climatic condition, decomposition rate is quicker if detritus is rich in nitrogen and waster soluble compounds like sugars. Rate of decomposition is slower if detritus is rich in lignin and chitin. Warm and moist environment favours decomposition.

Discussion

122.	Environmental factors which regulate the rate of release of nutrients into the atmosphere are a.pH b. Soil c. Moisture d. TemperatureA. a, b and cB. b ,c and dC. a, b and dD. a,b ,c and d
Answer» Correct Answer - D Environement factors which regulate the rate of release of nutrients into the atmosphere are : (a) pH (b) Soil. (c) Moisture (d) Temperature

Discussion

123.	Temperature and soil moisture regulate decomposition through their effects on theA. Chemical composition of detritusB. Activity of soil microbesC. Carbon dioxide content of detritusD. Both A and B
Answer» Correct Answer - B Temperature and soil moisture regulate decomposition through their effects on the activity of soil microbes.

Discussion

124.	Major site of decomposition in the soil and water bodies respectively isA. Bottom and upper layerB. Upper and bottom layerC. Upper and top layerD. Bottom and top layer
Answer» Correct Answer - B

Discussion

125.	The rate of decomposition of detritus is affected by the abiotic factors like availability of oxygen, pH of the soil substratum, temperature etc. Discuss.
Answer» Decomposition of dead remain or matter of animal and plant is carried out microorganisms like bacteria. fungi etc. The growth rate of these decomposers is affected by abiotic factors like temperature, humidity, pH of soil and light etc. The soil pH affect the composition of acidophilic and basophilic microorganisms. absence or presence of oxygen aerobic and anaerobic processes occurs. In presence of oxygen, complete degradation of substance occureds while in absence (1 oxygen. there will be an incomplete degradation. Similarly, at high temperature microbel can not grow optimally but high or low temperature favours the growth of stress tolerart microorganisms.

Discussion

126.	Decomposition takes place in which layer of soil at maximum rateA. upper layer of soilB. middle layers of soilC. lower layer of soilD. None of these
Answer» Correct Answer - A

Discussion

127.	Maximum net productivity in terrestrial ecosystem is:A. rain forestB. deciduous forestC. mangrove plantationD. Both (a) and (b)
Answer» Correct Answer - A

Discussion

128.	Which one of the following shows detritus food chain?A. Organic waste `to` Bacteria `to` MolluscansB. Grass `to` Insects `to` SnakesC. Plamkton `to` Small fishes `to` Large fishesD. All of the above
Answer» Correct Answer - A

Discussion

129.	Assertion: Detritus food chain begins with decomposers. Reason: Detrivores, like fungi and bacteria, are major decomposers in such food chains.A. If both Assertion &Reason are true and the reason is the corect explanation of the assertion , then mark (1)B. If both Assertion & Reason are true but the reason, is not the correct explanation of the assertion , then mark (2)C. If Assertion is true statement but Reason is false , them mark (3).D. If both Asseration and Reason are false statements , then mark (4).
Answer» Correct Answer - A

Discussion

130.	What do the detritus food chain begin with?
Answer» Detritus food chain begins with dead organic matters.

Discussion

131.	What are the differences between detritus and grazing food chains?
Answer» (a) Begins with Detritus-dead and decaying organic matter. (b) Grazing-Begins with living green plants.

131.

What are the differences between detritus and grazing food chains?

Answer»

(a) Begins with Detritus-dead and decaying organic matter.

(b) Grazing-Begins with living green plants.

Discussion

132.	Out of the following given ecosystem which one is most recently discovered ecosystem?A. VentsB. CraterC. TundraD. Iceberg
Answer» Correct Answer - A Scientists first discovered hydrothermal vents in 1977 while exploring an oceanic spreading ridge near the Galapagos Islands. To their amazement, the scientists also found that the hydrothermal vents were surrounded by large numbers of organisms that had never been seen before.

Discussion

133.	The Great Barrier Reef along the east coast of Australia can be categorized as:A. BiomeB. EcosystemC. PopulationD. Community
Answer» Correct Answer - B The Great Barrier Reef is a very special place. It is not one continuous reef, but made up of over 2900 reefs and 900 islands. It is the largest reef structure and marine park in the world.

Discussion

134.	Great Barrier Reef along east coast of Australia is aA. PopulationB. CommunityC. BiomeD. Ecosystem
Answer» Correct Answer - D Great Barrier Reef along east coast of Australia is an ecosystem.

Discussion

135.	The Great Barrier Reef along the east coast of Australia can be categorized as:A. populationB. CommunityC. ecosystemD. biome
Answer» Correct Answer - C

Discussion

136.	The great barrier reef along the east coast of Australia can be categorized asA. populationB. communityC. ecosystemD. biome
Answer» Correct Answer - C

Discussion

137.	Source of energy in ecosystem isA. SunB. ATPC. Sugar made by plantD. Green plant
Answer» Correct Answer - A

Discussion

138.	An ecosystem must have continuous, external source of:A. FoodB. EnergyC. MineralsD. All of these
Answer» Correct Answer - B

Discussion

139.	The source of energy in an ecosystem is-A. SunlightB. DNAC. ATPD. RNA
Answer» Correct Answer - A

Discussion

140.	Which one of the following is source of energy to an ecosystem?A. ATPB. Solar energyC. Sugar storedD. Heat liberated during respiration
Answer» Correct Answer - B

Discussion

141.	Which ecosystem has the highest gross primary productivity ?A. Rain forestsB. Coral reefsC. MangrovesD. Grasslands
Answer» Correct Answer - B Coral reefs ecosystem has the highest gross primary productivity.

Discussion

142.	Driving force of ecosystem is:A. BiomassB. producerC. solar energyD. carbohydrate in plants
Answer» Correct Answer - C

Discussion

143.	The driving force for an ecosystem isA. BiomassB. ProducersC. Carbohydrates in producersD. Solar energy
Answer» Correct Answer - D The driving force for an ecosystem is solar energy.

Discussion

144.	A farmer harvests his crop and expresses his harvest in three different ways.(a) I have harvested 10 quintals of wheat.(b) I have harvested 10 quintals of wheat today in one acre of land.(c) I have harvested 10 quintals of wheat in one acre of land, 6 months after sowing.Do the above statements mean one and the same thing. If your answer is yes, give reasons. And if your answer is ‘no’ explain the meaning of each expression.
Answer» No, the meaning of above statements is different (a) In this statement farmer gives information of only the quantity of the wheat but area and time period is not given. (b) In this statement farmer gives information of primary production that is quantity and area but not the time period. (c) In this statement farmer gives information of primary productivity that is quantity, area and time period all are given

144.

A farmer harvests his crop and expresses his harvest in three different ways.(a) I have harvested 10 quintals of wheat.(b) I have harvested 10 quintals of wheat today in one acre of land.(c) I have harvested 10 quintals of wheat in one acre of land, 6 months after sowing.Do the above statements mean one and the same thing. If your answer is yes, give reasons. And if your answer is ‘no’ explain the meaning of each expression.

Answer»

No, the meaning of above statements is different

(a) In this statement farmer gives information of only the quantity of the wheat but area and time period is not given.

(b) In this statement farmer gives information of primary production that is quantity and area but not the time period.

(c) In this statement farmer gives information of primary productivity that is quantity, area and time period all are given

Discussion

145.	Which of the following cannot be recycled in an ecosystem?A. WaterB. EnergyC. OxygenD. Nitrogen
Answer» Correct Answer - B

Discussion

146.	(A) : Nutreints are never lost from the ecosystems (R) : They are recycled time and again indefinitely.A. If both assertion and reason are true and the reason is a correct explanation of the assertion.B. If both assertion and reason are true but reason is not a correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false.
Answer» Correct Answer - A Nutrients are never lost from the ecosystems as nutrients are recycled time and again indefinitely

Discussion

147.	Which of the following cannot be recycled in an ecosystem?A. NitrogenB. WaterC. EnergyD. oxygen
Answer» Correct Answer - C Ecosystem is not recycled is ecosystem.

Discussion

148.	The diagram shows losses from a rat to the environment Which of the following will not be returned to the ecosystem and recycled ?A. Carbon dioxideB. Heat energyC. SaltsD. Urea
Answer» Correct Answer - B

Discussion

149.	The diagram shows parts of the carbon cycle. Which process converts most carbon form one form to the another ?A. Animal respirationB. DecayC. FeedingD. Photosynthesis
Answer» Correct Answer - D

Discussion

150.	In a biotic community , primary consumers areA. CarnivoresB. OmnivoresC. DetritivoresD. Herbivores
Answer» Correct Answer - D In a biotic community, the primary consumers or first order consumer are herbivores, they feedon producers.they are also called key industry animals because they convent plant material into animals material, e.g.rat, deer,cattle, goat, sheep, insects etc.

Discussion

Explore topic-wise InterviewSolutions in .

Distinguish between grazing and detritus food chain. Name the type of food chain helps in the flow of major fraction of energy through aquatic ecosystem.

Distinguish between Grazing food chain and Detritus food chain.

Resarchers like Robert Constanza et.al.,have put an average price tag of US $.........trillion a year on the fundamental ecological services.A. 33B. 50C. 6D. 10

In most ecosystems, all the pyramids are upright. But there are exceptions to this generalisation.1. Give any of the cases where pyramid of number and biomass becomes inverted.2. What is detritus food chain?

The average price tag of US is 22 trillion US dollars a year.1. What does this data indicate?2. How is it related to GNP?'(Gross National Production)3. Which is the most price lagged ecosystem service in nature?

Robert Constanza estimated price of fundamental ecosystem services areA. US `$` 33 trillionB. US `$` 13 trillionC. US `$` 50 trillionD. US `$` 60 trillion

If decomposition not occur in nature huge amount of detritus of plants and animals may fill our ecosystems, it is seriously harm to living organisms of our environment1. Define decomposition2. Give the steps3. Decomposers are known as scavengers of earth”. Justify

Decomposition is the breakdown of complex organic matter into inorganic substances like CO2 , Water, etc.1. Identify the gas which is most essential for decomposition.2. Find out any two conditions which inhibit decomposition.

Robert Constanza and his colleagues put price tags on nature’s life-support services. Price tag of US $ 33 trillion a year1. What is meant by, ecosystem services? Give example.2. Which is the most price lagged ecosystem service in nature?

Decomposition is largely an oxygen requiring process. Rate of decomposition depend upon many factors.1. What are the factors influence the rate of decomposition2. Explain it.

“Decomposition is an oxygen requiring process” Comment.

Among the following where do you think the process of decomposition would be the fastest?A. Tropical rain forestB. AntarcticC. Dry and regionD. Alpine region

In a particular climatic condition, decomposition rate is slower if:A. Detritus is rich in nitrogenB. Detritus is rich in humusC. Detritus is rich in sugarsD. Detritus is rich in lignin and chitin

In a particular climatic condition, decomposition rate is slower if detritus isA. nitrogenB. humusC. lignin and chitinD. water soluble substances

Breakdown of detritus into smaller particles by earthworm is a process calledA. HumificatioinB. FragmentationC. MineralisationD. Catabolism

The process of mineralisation by micro organisms helps in the release of:a. inorganic nutrients from humusb. both organic and inorganic nutrients from detritusc. organic nutrients from humusd. inorganic nutrients from detritus and formation of humus.

Decomposition rate is slow if detritus is rich inA. NitrogenB. HumusC. SugarsD. Lignin and Chitin

Most important climatic factors that regulate the rate of decomposition areA. Temperature and soil moistureB. Soil `pH` and aerationC. Aeration and temparatureD. Moisture and Soil `pH`

Environmental factors which regulate the rate of release of nutrients into the atmosphere are a.pH b. Soil c. Moisture d. TemperatureA. a, b and cB. b ,c and dC. a, b and dD. a,b ,c and d

Temperature and soil moisture regulate decomposition through their effects on theA. Chemical composition of detritusB. Activity of soil microbesC. Carbon dioxide content of detritusD. Both A and B

Major site of decomposition in the soil and water bodies respectively isA. Bottom and upper layerB. Upper and bottom layerC. Upper and top layerD. Bottom and top layer

The rate of decomposition of detritus is affected by the abiotic factors like availability of oxygen, pH of the soil substratum, temperature etc. Discuss.

Decomposition takes place in which layer of soil at maximum rateA. upper layer of soilB. middle layers of soilC. lower layer of soilD. None of these

Maximum net productivity in terrestrial ecosystem is:A. rain forestB. deciduous forestC. mangrove plantationD. Both (a) and (b)

Which one of the following shows detritus food chain?A. Organic waste `to` Bacteria `to` MolluscansB. Grass `to` Insects `to` SnakesC. Plamkton `to` Small fishes `to` Large fishesD. All of the above

What do the detritus food chain begin with?

What are the differences between detritus and grazing food chains?

Out of the following given ecosystem which one is most recently discovered ecosystem?A. VentsB. CraterC. TundraD. Iceberg

The Great Barrier Reef along the east coast of Australia can be categorized as:A. BiomeB. EcosystemC. PopulationD. Community

Great Barrier Reef along east coast of Australia is aA. PopulationB. CommunityC. BiomeD. Ecosystem

The Great Barrier Reef along the east coast of Australia can be categorized as:A. populationB. CommunityC. ecosystemD. biome

The great barrier reef along the east coast of Australia can be categorized asA. populationB. communityC. ecosystemD. biome

Source of energy in ecosystem isA. SunB. ATPC. Sugar made by plantD. Green plant

An ecosystem must have continuous, external source of:A. FoodB. EnergyC. MineralsD. All of these

The source of energy in an ecosystem is-A. SunlightB. DNAC. ATPD. RNA

Which one of the following is source of energy to an ecosystem?A. ATPB. Solar energyC. Sugar storedD. Heat liberated during respiration

Which ecosystem has the highest gross primary productivity ?A. Rain forestsB. Coral reefsC. MangrovesD. Grasslands

Driving force of ecosystem is:A. BiomassB. producerC. solar energyD. carbohydrate in plants

The driving force for an ecosystem isA. BiomassB. ProducersC. Carbohydrates in producersD. Solar energy

Which of the following cannot be recycled in an ecosystem?A. WaterB. EnergyC. OxygenD. Nitrogen

Which of the following cannot be recycled in an ecosystem?A. NitrogenB. WaterC. EnergyD. oxygen

The diagram shows losses from a rat to the environment Which of the following will not be returned to the ecosystem and recycled ?A. Carbon dioxideB. Heat energyC. SaltsD. Urea

The diagram shows parts of the carbon cycle. Which process converts most carbon form one form to the another ?A. Animal respirationB. DecayC. FeedingD. Photosynthesis

In a biotic community , primary consumers areA. CarnivoresB. OmnivoresC. DetritivoresD. Herbivores