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

A food chain starts from

  1. consumer

  2. producer

  3. decomposer

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

A food chain starts from autotrophs or plants.

Multiple choice

Organisms who depend on dead organic matter for food are called

  1. saprophytes

  2. parasites

  3. autotrophic

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

 Organisms who depend on dead organic matter for food are called saprophytes.These organisms are also known as decomposers, they decompose the dead matter.Examples of saprophytes are fungi, yeast, mushrooms, moulds, etc.

Multiple choice

Which of the following correctly defines saprophytic organism?

  1. Organism that feeds on green plants

  2. Organism that feeds on dead and decaying matter

  3. Organism that feeds on fruits only

  4. Organism that feeds on insects and worms
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Organisms that feed on dead and decaying matter are saprophytic organisms. They obtain nutrients from dead organic matter.

Multiple choice

What are the animals that consume flesh called?

  1. Decomposers

  2. Herbivores

  3. Carnivores

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

Animals according to their dietary habits are of three types; flesh eating are called carnivores, plant eating are called herbivores and eating both plant and flesh are called omnivores. 

Multiple choice

Animals that eat plants as well as animals are called ______.

  1. scavengers

  2. omnivores

  3. herbivores

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

Animals according to their dietary habits are of three types; flesh eating are called carnivores, plant eating are called herbivores and eating both plant and flesh are called omnivores. 

Multiple choice

An organism takes to maintain life and growth.

  1. food

  2. energy

  3. water

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

Food is vital for living beings as it helps in the maintenance of the body by protecting us from disease and regulating our body functions by providing proper nutrition. It also helps the organisms in their proper growth. So, anything taken in for maintaining life and growth of organism is known as food. 

Multiple choice

Living organisms require nutrients to ________.

  1. grow

  2. obtain energy

  3. repair damaged parts

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The nutrients obtained by living organisms help them to grow, to get energy for their daily activities and to repair the damaged tissues.

Multiple choice

Humans and animals for their nutrition, directly or indirectly, depend upon ______.

  1. plants

  2. their surroundings

  3. air

  4. aquatic animals

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

Nutrition is the sum total of the food requirements of the living organisms. Humans and animals cannot fulfill their nutritional requirements by making use of their surroundings. Even the aquatic animals depend upon plants as plants are the autotrophic organisms, which can prepare their food directly by using inorganic substances and surroundings. So, all the living organism directly or in directly depend on plants for nutrition.