Food Chain and Food Web MCQ Quiz in मल्याळम - Objective Question with Answer for Food Chain and Food Web - സൗജന്യ PDF ഡൗൺലോഡ് ചെയ്യുക

The correct answer is Food Chain.

Key Points

• A food chain represents the linear sequence of organisms through which nutrients and energy pass as one organism eats another.
• It starts with primary producers (like plants) and moves up to primary consumers (herbivores), secondary consumers (carnivores), and so on.
• Each step in a food chain is called a trophic level, and organisms at each level depend on those below them for energy.
• Food chains are a fundamental concept in ecology, helping to understand the flow of energy and the interdependence of organisms in an ecosystem.

Additional Information

• Trophic Cascade
  • A trophic cascade is an ecological phenomenon triggered by the addition or removal of top predators, leading to dramatic changes in the ecosystem structure and nutrient cycling.
  • An example would be the reintroduction of wolves to Yellowstone National Park, which affected the population of deer and subsequently the vegetation and other animal species.
• Food Web
  • A food web is a complex network of interconnected food chains within an ecosystem, showing how different organisms are related through various feeding relationships.
  • Unlike a food chain, a food web illustrates multiple pathways through which energy and nutrients flow among organisms.
• Ecological Pyramid
  • An ecological pyramid is a graphical representation showing the relative amounts of energy or biomass at each trophic level in an ecosystem.
  • There are three main types of ecological pyramids: pyramid of numbers, pyramid of biomass, and pyramid of energy.
  • These pyramids help to visualize the distribution of energy and matter among the different levels of a food chain.

Concept:

• The transfer of food energy from producers (plants) through a series of organisms that consume and are consumed is termed the food chain.
• A food chain shows the linear movement of energy through a system by indicating the path of food from a producer to a final consumer.
• Food chains may have 3 to 5 trophic links with 15 to 20 species.
• The length of a particular food chain reflects the physical characteristics of a particular ecosystem.
• Within any ecosystem, there are 2 major food chains, such as the Grazing food chain and the Detritus food chain.
• The difference between these two food chains is the source of energy for the primary consumers.
• The grazing food chain starts with photosynthetic plants, while the detritus food chain starts with dead organic matter.
• Most of the natural ecosystems possess both grazing and detritus food chains.
• In terrestrial and shallow-water ecosystems grazing food chains dominate because a major proportion of the annual energy flow passes through this chain.
• In tidal marshes, almost 90% of the primary production is routed through the detritus food chains.

Explanation:

• Detritus food chains begin with dead organic matter and go from non-living organic matter to detrivores and their predators.
• Dead leaves → Woodlouse → Blackbird represents the detritus food chain.
• A large amount of organic matter is generated by the death of plants and their parts, animals, and their excretory products in all ecosystems.
• In these food chains, the flow of energy is not unidirectional. 
• The waste materials and dead organic matter in each of the trophic levels are recycled and returned as input to the dead organic matter at the base of the detritus food chains.

Additional Information

• Oaktree → Insects → Warbler and Grass → Rat → Snake → Eagle food chain represents the grazing food chain.
• Phytoplanktons → Zooplanktons → Small fish → Large fish food chain represents the aquatic grazing food chain.

Hence, the correct option is (2) Dead leaves → Woodlouse → Blackbird.

The correct answer is 10%.Key Points

• The term "trophic level transfer efficiency" is the average amount of organic matter that is transferred from one trophic level to the next.
• This value is usually around 10%, meaning that only 10% of the organic matter from one level is transferred to the next level.
• Because energy is lost as metabolic heat when animals from one trophic level are consumed by species from the next, energy declines as it goes up the trophic levels.

Additional Information

• The food chain is a straight line made up of creatures in which energy and nutrients are passed from one to the next.
• When one creature eats another, this happens. 
• The decomposer organism comes at the end of the chain, having started with the producer organism. 

The correct answer is Surface feeders, middle zone feeders and bottom feeders (More than one of the above)

Explanation:

• composite fish culture is a common method for getting the most fish out of a pond or reservoir.
• Through the use of various feeding zones of the pond or water tank, the technology employs suitable and non competing fish culture, leading to a high fish output per unit area of water.
• Surface feeders, intermediate zone feeders, and bottom feeders are ideal for composite fish production since they consume all available food and do not compete for it 
• Five to six distinct kinds of fish can be cultivated together in the same fish pond in the composite fish culture. 

Additional Information

•  It is also called Polyculture.
• The selected fishes should be from different food habitats to avoid the food fight. 
• Composite fish culture can increase the yield of the fish
• Example of composite fish culture: Catla feed on the surface of the water, Rohu are middle zone feeders, Mrigal and common carp are bottom feeders, and Grass crap feed on weeds.
• The survival rate of fish is high in composite fish culture.

The correct answer is Only producers of the food chain form a trophic level.

Key Points

• There are unique interactions and relationships which are involved in the transportation of energy.
• The energy, once produced and captured, is distributed throughout the various living organisms.
• This transfer of energy is termed the food web.
• In specialized terms, Food Chain is the sequence through which the transfer of energy takes place within a particular ecosystem.
• Energy transfer is pivotal for the survival and food of living organisms.
• Trophic position refers to the successional stages in a food chain, starting with directors at the bottom, followed by primary, secondary, and tertiary consumers.
• Every position in a food chain is known as a trophic position. Hence, the Option 3 is Incorrect.​

Important Points

•  Both food chains and food webs, share three types of organisms in a food chain: Producers, Consumers, and decomposers.
  • Producers: The producers in a food chain include all autotrophs such as phytoplankton.
    • This is the first stage in a food chain.
    • The producers make up the first level of a food chain.
  • Consumers: Consumers are all organisms that are dependent on plants or other organisms for food.
    • This is the largest part of a food web, as it contains almost all living organisms.
    • It includes herbivores which are animals that eat plants, carnivores which are animals that eat other animals, parasites that live on other organisms by harming them, and lastly scavengers, which are animals that eat dead animals’ carcasses.
  • Decomposers: Decomposers are organisms that get energy from dead or waste organic material.
    • This is the last stage in a food chain.
    • Decomposers are an integral part of a food chain, as they convert organic waste materials into inorganic materials, which enriches the soil or land with nutrients.

The correct answer is Option 2 (Grass → Mouse → Hawk → Snake).

Concept:

• Food chain: 
  • A food chain depicts the feeding relationship between various organisms in a specific environment.
  • The transfer of energy from producers to top consumers, and from consumers to decomposers through a series of organisms is called a food chain.
  • Each step or level of the food chain forms a trophic level.
  • The autotrophs or the producers are at the first trophic level.
  • The herbivores or the primary consumers come at the second, small carnivores, or the secondary consumers at the third, and larger carnivores, or the tertiary consumers form the fourth trophic level.

Explanation:

Green plants → Deer → Tiger (Correct)

• In this food chain, grass is the producer, while deer and tigers are all consumers who rely on one another for food.

Grass → Mouse → Hawk → Snake (Incorrect)

• In this food chain, Grass is the producer, so it occupies the first trophic level.
• Mouse, the primary consumers, form the second trophic level, followed by the snake, the secondary consumer, and finally, the hawk, the top consumer, which forms the fourth trophic level.
• Thus, the correct sequence is Grass → Mouse → Snake → Hawk.

Marine algae → Small fish → Large fish → Shark (Correct)

• In this food chain, marine algae are primary producers and small fishes are the primary consumers.
• Large fishes are consuming primary consumers (small fishes), therefore they are secondary consumers.
• Sharks are tertiary consumers.

Seeds → Squirrel → Owl (Correct)

• Seeds are the starting point of this food chain.
• Squirrels are considered primary consumers in this food chain because they feed directly on the seeds.
• Owls are carnivorous predators that feed on small animals, including squirrels.

The correct answer is Surface feeders, middle zone feeders and bottom feeders

Explanation:

• composite fish culture is a common method for getting the most fish out of a pond or reservoir.
• Through the use of various feeding zones of the pond or water tank, the technology employs suitable and non-competing fish culture, leading to a high fish output per unit area of water.
• Surface feeders, intermediate zone feeders, and bottom feeders are ideal for composite fish production since they consume all available food and do not compete for it 
• Five to six distinct kinds of fish can be cultivated together in the same fish pond in the composite fish culture. 

Additional Information

•  It is also called Polyculture.
• The selected fishes should be from different food habitats to avoid the food fight. 
• Composite fish culture can increase the yield of the fish
• Example of composite fish culture: Catla feed on the surface of the water, Rohu are middle zone feeders, Mrigal and common carp are bottom feeders, and Grass crap feed on weeds.
• The survival rate of fish is high in composite fish culture.

The correct answer is Surface feeders, middle zone feeders and bottom feeders

Explanation:

• composite fish culture is a common method for getting the most fish out of a pond or reservoir.
• Through the use of various feeding zones of the pond or water tank, the technology employs suitable and non-competing fish culture, leading to a high fish output per unit area of water.
• Surface feeders, intermediate zone feeders, and bottom feeders are ideal for composite fish production since they consume all available food and do not compete for it 
• Five to six distinct kinds of fish can be cultivated together in the same fish pond in the composite fish culture. 

Additional Information

•  It is also called Polyculture.
• The selected fishes should be from different food habitats to avoid the food fight. 
• Composite fish culture can increase the yield of the fish
• Example of composite fish culture: Catla feed on the surface of the water, Rohu are middle zone feeders, Mrigal and common carp are bottom feeders, and Grass crap feed on weeds.
• The survival rate of fish is high in composite fish culture.

The correct answer is Surface feeders, middle zone feeders and bottom feeders

Explanation:

• composite fish culture is a common method for getting the most fish out of a pond or reservoir.
• Through the use of various feeding zones of the pond or water tank, the technology employs suitable and non-competing fish culture, leading to a high fish output per unit area of water.
• Surface feeders, intermediate zone feeders, and bottom feeders are ideal for composite fish production since they consume all available food and do not compete for it 
• Five to six distinct kinds of fish can be cultivated together in the same fish pond in the composite fish culture. 

Additional Information

•  It is also called Polyculture.
• The selected fishes should be from different food habitats to avoid the food fight. 
• Composite fish culture can increase the yield of the fish
• Example of composite fish culture: Catla feed on the surface of the water, Rohu are middle zone feeders, Mrigal and common carp are bottom feeders, and Grass crap feed on weeds.
• The survival rate of fish is high in composite fish culture.

The correct answer is Only producers of the food chain form a trophic level.

Key Points

• There are unique interactions and relationships which are involved in the transportation of energy.
• The energy, once produced and captured, is distributed throughout the various living organisms.
• This transfer of energy is termed the food web.
• In specialized terms, Food Chain is the sequence through which the transfer of energy takes place within a particular ecosystem.
• Energy transfer is pivotal for the survival and food of living organisms.
• Trophic position refers to the successional stages in a food chain, starting with directors at the bottom, followed by primary, secondary, and tertiary consumers.
• Every position in a food chain is known as a trophic position. Hence, the Option 3 is Incorrect.​

Important Points

•  Both food chains and food webs, share three types of organisms in a food chain: Producers, Consumers, and decomposers.
  • Producers: The producers in a food chain include all autotrophs such as phytoplankton.
    • This is the first stage in a food chain.
    • The producers make up the first level of a food chain.
  • Consumers: Consumers are all organisms that are dependent on plants or other organisms for food.
    • This is the largest part of a food web, as it contains almost all living organisms.
    • It includes herbivores which are animals that eat plants, carnivores which are animals that eat other animals, parasites that live on other organisms by harming them, and lastly scavengers, which are animals that eat dead animals’ carcasses.
  • Decomposers: Decomposers are organisms that get energy from dead or waste organic material.
    • This is the last stage in a food chain.
    • Decomposers are an integral part of a food chain, as they convert organic waste materials into inorganic materials, which enriches the soil or land with nutrients.