Questions Related to evs - i

Multiple choice evs - i issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

Which one of the following factors is contributed by biotic elements in the ecosystem

  1. Photoperiod

  2. $CO _{2}$
  3. Texture and porosity of soil

  4. Rainfall

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biotic elements are the living components of an ecosystem. CO2 is part of the carbon cycle, which is heavily influenced by biotic processes like respiration and photosynthesis, whereas photoperiod, soil texture, and rainfall are abiotic factors.

Multiple choice evs - i issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

Study of inter-relationships between a species/individual and its environment in all stages of its life cycle is

  1. Synecology

  2. Autecology

  3. Forest Ecology

  4. Ecology

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Autecology is the study of the ecology of a single individual or species in relation to its environment. Synecology, by contrast, is the study of groups of organisms or communities.

Multiple choice evs - i issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

Biome has organisms of various trophic levels 

  1. Reacting with abiotic environment

  2. Constitute a sociological unit

  3. Live a symbiotic life

  4. Inhabit a desert

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Biome is a community that consists of plants and animals having common characteristics in a given environment. In other words, biome has organisms of various trophic levels reacting with abiotic environment. The different biomes include aquatic biome, forest biome, desert biome, tundra biome and grassland biome.

Thus, the correct answer is 'Reacting with abiotic enviornment.'

Multiple choice evs - i issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

Ecosystem contains 

  1. Food web

  2. Food chain

  3. Both A and B

  4. None of the above

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An ecosystem is all plants and animal species along with environment. It consists of biotic components such as producers, consumers and decomposers and abiotic components such as air, water, temperature, soil. It contains both food chain and food web. Food chain consists of producers, consumers and decomposers. It is a series of plants/animals which are interrelated in the form of organism being eaten as food by the other organism. Various interlinked food chains in a community constitutes the food web.

Thus, the correct answer is 'Both A and B.'

Multiple choice evs - i issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

Which one is not the dynamic aspect of an ecosystem?

  1. Producers and mineral cycles

  2. Consumers and mineral cycles

  3. Producers and energy flow

  4. Energy flow and mineral cycles

Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

Dynamic aspects of an ecosystem are mineral cycles and energy flow. Mineral cycles are biogeochemical cycles through which there is exchange or circulation of nutrients in the biosphere. Energy flow occurs in a unidirectional manner in an ecosystem from lower trophic levels to higher trophic levels. Through these dynamic aspects, biotic and abiotic components of an ecosystem are connected. Biotic components are living part of the environment which include producers, consumers and decomposers whereas abiotic components are non living part of the environment which include light, water, temperature etc.

So, the correct answer is options 'A, B and C'.

Multiple choice evs - i issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

Which of the following is non-essential in an ecosystem:-

  1. $Co _2$
  2. Grass

  3. soil

  4. Fungi

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Fungi are saprophytes, i.e they absorb nourishment from dead and decaying organisms.
They belong to the detritus cycle which includes bacteria and other microorganisms. So do not form the essential component of the ecosystem
So, the correct answer is 'Fungi'
Multiple choice evs - i issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

What does environment include?

  1. Biotic and abiotic factors

  2. Animals and Plants

  3. Microorganisms

  4. Non-living things

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The environment is defined as the sum of all living (biotic) and non-living (abiotic) components that surround and influence an organism. Options B, C, and D are subsets of these factors, making A the most comprehensive definition.

Multiple choice evs - i issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

What is role of an acosystem?

  1. providing nutritional support to plants

  2. to generate life continuity, flourishing distinctive structure to all species

  3. helping animals to survive in an environment

  4. All of above

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An ecosystem functions to maintain life by cycling materials and providing structure, which ensures the continuity of various species. The other options are too narrow or incomplete.