1
Question
How many of the following statements (A-D) are correct?
A. The species composition of an ecosystem is obtained by the identification and enumeration of plant species only
B. Vertical distribution of different species occupying different levels is called stratification
C. Producers are the heterotrophic components of an ecosystem
D. A great variety of organisms are found in the coral reefs and desert ecosystems
How many of the following statements (A-D) are correct?
A. The species composition of an ecosystem is obtained by the identification and enumeration of plant species only
B. Vertical distribution of different species occupying different levels is called stratification
C. Producers are the heterotrophic components of an ecosystem
D. A great variety of organisms are found in the coral reefs and desert ecosystems
Open in App
Solution
The correct option is A 1
Ecosystem is a functional unit of nature, where living organisms interact among themselves and also with their physical environment.
The interaction of biotic and abiotic components result in a physical structure that is characteristic of each ecosystem.
The abiotic components include the non-living factors like water, soil rich in nutrients, temperature, light and other climatic conditions.
Biotic components include living organisms. They include producers (autotrophs), consumers (heterotrophs) and decomposers (saprotrophs).
Producers are the autotrophic components of the ecosystem as they synthesise food by utilising the radiant energy from the sun by the process of photosynthesis.
Hence, statement C is incorrect.
Identification and enumeration of plant and animal species gives the species composition of an ecosystem.
Hence, statement A is incorrect.
Different ecosystems have different species composition which depend on various factors.
A great variety of species is found in the coral reefs whereas few species are found in the deserts.
Coral reefs are one of the most diverse ecosystems in the world. It is an aquatic ecosystem characterised by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. It provides habitat for a variety of marine life, including sponges, oysters, crabs, sea stars, sea urchins, and many fish species.
The harsh conditions like intense solar radiation, lashing winds, little moisture and less rainfall make the desert life tough. Organisms that can adapt to these harsh conditions can survive in deserts. For example, plants like cactus and animals like camels.
Hence, statement D is incorrect.
Vertical distribution of species at different levels is called stratification. For example, trees occupy the top vertical strata or layer of a tropical rainforest, shrubs occupy the second layer and herbs and grasses occupy the bottom layers.
Hence, statement B is correct.
Ecosystem is a functional unit of nature, where living organisms interact among themselves and also with their physical environment.
The interaction of biotic and abiotic components result in a physical structure that is characteristic of each ecosystem.
The abiotic components include the non-living factors like water, soil rich in nutrients, temperature, light and other climatic conditions.
Biotic components include living organisms. They include producers (autotrophs), consumers (heterotrophs) and decomposers (saprotrophs).
Producers are the autotrophic components of the ecosystem as they synthesise food by utilising the radiant energy from the sun by the process of photosynthesis.
Hence, statement C is incorrect.
Identification and enumeration of plant and animal species gives the species composition of an ecosystem.
Hence, statement A is incorrect.
Different ecosystems have different species composition which depend on various factors.
A great variety of species is found in the coral reefs whereas few species are found in the deserts.
Coral reefs are one of the most diverse ecosystems in the world. It is an aquatic ecosystem characterised by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. It provides habitat for a variety of marine life, including sponges, oysters, crabs, sea stars, sea urchins, and many fish species.
The harsh conditions like intense solar radiation, lashing winds, little moisture and less rainfall make the desert life tough. Organisms that can adapt to these harsh conditions can survive in deserts. For example, plants like cactus and animals like camels.
Hence, statement D is incorrect.
Vertical distribution of species at different levels is called stratification. For example, trees occupy the top vertical strata or layer of a tropical rainforest, shrubs occupy the second layer and herbs and grasses occupy the bottom layers.
Hence, statement B is correct.
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
