Biology · Environmental Studies

Ecosystem Nutrition and Energy Flow

1,093 Questions

Ecosystem nutrition and energy flow questions cover trophic levels, food chains, and biodegradable materials. These concepts frequently appear in general science sections of major competitive exams. Review these questions to build a solid understanding of ecological interactions.

Trophic levels conceptFood chain orderAutotrophic nutritionEnergy assimilationScavengers and decomposers

Ecosystem Nutrition and Energy Flow Questions

Multiple choice

Which of the following organisms are totally dependent upon other animals for their food?

  1. Omnivores

  2. Producers

  3. Carnivores

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

Carnivores are totally dependent upon other animals for their food. Carnivorous animals are meat-eaters, meaning that they only eat other animals in order to get their nutrition. Carnivores usually have sharp teeth and strong jaws, which they need to successfully, catch and eat their prey. Lions, crocodiles, sharks, otters and weasels are all carnivorous animals.

Multiple choice

Among mammals, an herbivore has

  1. more teeth than carnivore

  2. flatter teeth than carnivore

  3. teeth that are more pointed than carnivore

  4. fewer teeth than a carnivore
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Among mammals, a herbivore hasflatter teeth than carnivore 

Multiple choice

Humans are:

  1. Carnivores

  2. Herbivores

  3. Omnivores

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

humans eat meat and plant both and that's why they are omnivorous.

Multiple choice

Heterotrophic ingestive nutrition is found in

  1. Monera

  2. Animalia

  3. Plantae

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

heterotrophic nutrition :A type of nutrition in which energy is derived from the intake and digestion of organic substances. Ingestion is the consumption of a substance by an organism

Multiple choice

In absorptive heterotrophy

  1. Solid organic food is obtained from outside

  2. Liquid organic food is absorbed from outside

  3. Inorganic raw materials are obtained

  4. Energy is absorbed from sun
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Absorptive heterotrophy is when an organism which secretes enzymes externally into its environment to digest organic materials which are then absorbed

Multiple choice

If all the carbon dioxide were withdrawn from the biosphere, which organism would first experience the negative effects?

  1. Primary consumers

  2. Secondary consumers

  3. Producers

  4. Decomposers

  5. Tertiary consumers
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Producers are the green plants which prepare their food by photosynthesis by carbon dioxide, water, sunlight and chlorophyll. Hence, if all the carbon dioxide were to be withdrawn from the atmosphere they will be unable to do photosynthesis.

 

Multiple choice

What will happen, if all the green plants disappear from the earth?

  1. The carnivores will continue to live.

  2. Only the birds and insects will die.

  3. All the animals will die.

  4. Chemosynthetic bacteria will produce food for all.

  5. Decomposers will start acting in a massive way.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is true because all the animals directly or indirectly depend upon green plants for thier food intake.

Multiple choice

In most food webs green plants are very important because ______________.

  1. most animals eat plants

  2. they contain chlorophyll

  3. they can perform photosynthesis

  4. they provide protection to animals

  5. they consume and remove carbon dioxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plants are very important as they perform photosynthesis by the help of chlorophyll, sunlight and carbon dioxide. M ost animals directly or indirectly depend upon plants for their survival.

Multiple choice

Which of the following options shows Biotic components?

  1. Producers, consumers, decomposers

  2. Consumers only

  3. Producers only

  4. Producers and consumers

  5. Decomposers only
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Producers are the green plants,  which prepare food by photosynthesis. Consumers consume the food prepared by the plants and decomposers are the microorganisms, which decompose everything.

Multiple choice

Which of the following is a logical sequence in carbon cycle?

  1. Producer - Consumer - Decomposer

  2. Decomposer - Consumer - Producer

  3. Producer - Decomposer - Consumer

  4. Consumer - Producer - Decomposer
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon cycle is the biogeochemical cycle by which carbon is exchanged among the bio - sphere pedophere, geosphere, hydrosphere and atmosphere of the earth.