Biology · Environmental Studies

Ecosystem Nutrition and Energy Flow

1,235 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

Edaphic factors are included in ____________.

  1. biotic component

  2. producers

  3. abiotic component

  4. consumers

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

Edaphic factors are abiotic components; defined as 'ecological influences properties of the soil brought about by the physical and chemical characteristics'.

Multiple choice

What is not true regarding the flow of energy in an ecosystem?

  1. The flow of energy is unidirectional.

  2. Green plants capture only 1% of radiant solar energy.

  3. The captured energy by autotrophs reverts back to the solar input.

  4. Average 10% organic matter is available at each trophic level.

  5. Lot of energy as heat is lost at each level.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The captured energy by autotrophs do not reverts back to the solar input.

Multiple choice

No matter how adverse the conditions may become for the people of the Arctic, they will never hunt and eat a penguin. Why so?

  1. This is because it is illegal.

  2. This is because they consider penguins sacred.

  3. This is because penguins are too agile for them and it is not worth the effort.

  4. This is because penguins are small in size and do not provide sufficient meat.

  5. None of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Penguins live in the Antarctic (south), not the Arctic (north).

Multiple choice

Which of the following statements is/are true regarding the food chain given below? Grass → rabbits → snakes → hawks

  1. Each predator population has a greater biomass than its prey population.

  2. Each prey population has a greater biomass than its predator population.

  3. Each population is omnivorous.

  4. Both (1) and (3) are correct.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Each prey population has a greater biomass than its predator population in all food chains except in pond ecosystem. 

Multiple choice

Which of the following roles are played by the air plays in the life cycle on Earth? (a) Air helps in the movements of sailing yachts, gliders, parachutes and airplanes.
(b) Birds, bats and insects can fly due to the presence of air. (c) Air plays an important role in water cycle. (d) Air helps in the dispersal of seeds and pollen of flowers of several plants.

  1. a, b and d

  2. a, b and c

  3. a, c and d

  4. none of them

  5. all of them
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Correct. Air plays an important role in the life cycle of Earth. All these are possible only because of presence of air.

Multiple choice

What is the mode of nutrition in fungi?

  1. Saprotrophic

  2. Autotrophic

  3. Heterotrophic

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

Fungi feed on dead and decaying organic matter by releasing digestive enzymes from their bodies. Then, they absorb the digested and soluble form of food and derive their nutrition, which is known as saprotrophic nutrition.

Multiple choice

Which of the following elements has only sedimentary type of nutrient cycle?

  1. Carbon

  2. Hydrogen

  3. Nitrogen

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

Biogeochemical cycle can be broken down into 2 types of local cycles, such as phosphorus cycle, which involves elements with no mechanisms for long distance transfer, and global cycles, which invoke an interchange between the atmosphere and the ecosystem.