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Multiple choice evs insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

A rat feeding upon potato tuber is

  1. Producer

  2. Carnivore

  3. Decomposer

  4. Primary consumer
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rat is a herbivore animal, who used to eat plant products. The potato plant is a producer who trap solar energy and produces food (carbohydrates), which are stored in potato tubers. The rat cannot produces their own food by the use of solar energy and hence, feeds on potato tuber for his life processes.

Thus, the correct answer is option D.

Multiple choice evs insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

Trophic levels in a food chain are formed by

  1. Producers

  2. Consumers

  3. Decomposers

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A food chain is series of plants/animals which are interrelated in the form of organism being eaten as food by the other. Trophic levels in a food chain are formed by producers, consumers and decomposers. In the given food chain, plants are producers. The animals eating plants are called as primary consumers and animals eating primary consumers are called as secondary consumers. Decomposers are those which decomposes the waster organic matter and release energy back in the environment.
Thus, the correct answer is 'All of the above.'
Multiple choice evs insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

A food chain can have trophic levels

  1. Three or four

  2. Three

  3. Two

  4. One
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Food chain in an ecosystem is defined as the passage of food from one trophic level to the next higher trophic level. The transfer of food from one trophic level to the next level results in the passage of energy through these trophic levels. A food chain can have 3 or 4 trophic levels. Plants are producers which are present in first trophic level. Primary consumers are second trophic levels which eat plants. They are herbivores. Secondary consumer are present make third trophic level. They eat primary consumers and are carnivores. Tertiary or top consumer make fourth trophic level. They are carnivores

Thus, the correct answer is 'Three or four.'

Multiple choice evs insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

Food levels of an ecosystem are known as

  1. Producer levels

  2. Herbivore levels

  3. Consumer levels

  4. Trophic levels
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A food chain is series of plants/animals which are interrelated in the form of organism being eaten as food by the other. A food chain consists of producers abd consumers. In the given food chain, plants are producers. They are present in the first trophic level. It is also called as T$ _1$ trophic level. The animals eating plants are called as primary consumers. They are herbivores and occupy the second trophic level in an ecosystem. It is also called as T$ _2$ trophic level. Animals eating primary consumers are called as secondary consumers. They occupy the third trophic level in an ecosystem. It is also called as T$ _3$ trophic level. 

Thus, the correct answer is 'Trophic levels.'

Multiple choice evs insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

Trophic levels are formed by-

  1. only plants

  2. only animals

  3. only carnivores

  4. organisms linked in food chain
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A trophic level is the position of an organism in a food chain. A food chain starts with producers which are green plants and occupy the lowest trophic level. The highest trophic level is occupied by carnivores which feed on lower trophic levels for energy. A simple food chain is represented as:
Plant ---> Herbivore ---> Carnivore
Hence, trophic levels are formed by different organisms linked in a food chain.
So, the correct answer is 'organisms linked in the food chain'.
Multiple choice evs insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

Each step in a food chain is called a

  1. trophical level.

  2. consumer level.

  3. food web.

  4. producer.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A. Trophic level is the position of an organism that it occupies in a food chain. Simply, trophic level is each step in a food chain representing producers and consumers.
B. Consumer levels represent heterotrophs that feed on producers and occupy higher trophic levels in a food chain.
C. Food web is an interconnected network of food chains.
D. Producers are the green plants that convert light energy into chemical energy and prepare their food. 
So, the correct answer is 'trophical level'.
Multiple choice evs insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

Which pair is not correctly related?

  1. GPP - Photosynthetic organisms

  2. Middle strata of forest ecosystem - Shrubs

  3. Abundance of decomposers - Sea surface

  4. Flow of energy - Always unidirectional
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A. Gross primary productivity (GPP) is a term used to describe the rate at which plants and other photosynthetic organisms produce organic compounds in an ecosystem. Hence 'GPP - Photosynthetic organisms' are related to each other.

B. Stratification is the layering of habitats within an ecosystem with the presence of distinctive physical and biological boundaries between the strata (layers). In a temperate deciduous forest, you typically have 5 vertical layers: the canopy layer, the sapling layer, the shrub layer, the herbaceous layer, and the moss layer. Hence 'Middle strata of forest ecosystem - Shrubs' are related to each other.
C. The cycling of materials such as carbon, water, and other nutrients is mainly dependent upon soil-dwelling decomposer organisms such as bacteria fungi, earthworms, and insects. Bacteria and fungi are the most abundant of the microbial decomposers. Hence the sea surface is not a decomposer 'Abundance of decomposers - Sea surface' are not related to each other.
D. The flow of energy in food chains is unidirectional. The energy which passes to the herbivores does not come back to the autotrophs. The energy that is captured by the autotrophs does not revert back to the Sun. Hence 'Flow of energy - Always unidirectional' are related to each other.
So the answer is option C 'Abundance of decomposers - Sea surface'. 

Multiple choice evs insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

Which one occupies more than one trophic level in a pond ecosystem?

  1. Zooplankton

  2. Phytoplankton

  3. Fish

  4. Frog
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A fish consuming phytoplanktons occupies primary consumer level while when consuming another small fish, it occupies secondary consumer level. So, a fish can occupy more than one trophic level in a pond ecosystem.

So, the correct answer is option C, fish.

Multiple choice evs insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

Grass $\rightarrow$ Goat $\rightarrow$ Man  $\rightarrow$
In above food chain man is

  1. Top consumer

  2. Secondary consumer

  3. Primary consumer

  4. Producer
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A trophic level is a group of organisms within an ecosystem which occupy the same level in a food chain. There are five main trophic levels within a food chain, each of which differs in its nutritional relationship with the primary energy source. The primary energy source in any ecosystem is the Sun. Primary producers are usually plants and algae, which perform photosynthesis in order to manufacture their own food source. Primary producers make up the first trophic level. The second trophic level consists of herbivores, these organisms gain energy by eating primary producers and are called primary consumers. Trophic levels three, four and five consists of carnivores and omnivores. Trophic level three consists of carnivores and omnivores (Example: Man) which eat herbivores; these are the secondary consumers. 

So, the correct answer is 'Secondary consumer'.

Multiple choice evs insectivorous plants meaning of an ecosystem food chain and food web components of environment and their interdependencies

Which of the following trophics level is occupied by man feeding on curd?

  1. $T _2$
  2. $T _3$
  3. $T _4$
  4. $T _1$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A man feeding on curd occupied the third trophic level. Here, the grasses are at the first trophic level, the cow/buffalo who feeds on grasses is at the second trophic level. The curd is prepared by the milk of cow/buffalo by the action of bacteria, but the energy of the milk is getting transferred to the man, so man is at the third trophic level.

Hence, the correct answer is 'T$ _{3}$'