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 statements is/are false?

a. The mode of nutrition in humans and other animals is autotrophic. b. A type of relationship between organisms in which both the partners are benefitted by each other is called symbiotic relationship. c. Food provides energy for movements, such as running, walking or raising of arms.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option as this statement is false.

Multiple choice

Which of the following statements is/are false?

a. Insectivorous plants can carry out photosynthesis, but they cannot obtain nitrogen-rich substances from the soil. b. Algae are green in colour due to the presence of chlorophyll. c. An organism that provides nutrients to another organism without being benefitted is called a heterotroph.

  1. Only a

  2. Both a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as this statement is false.

Multiple choice

Which of the following statements is/are false?

a. Nutrition is the mode of intake of food by an organism and its utilisation by the body. b. The mode of nutrition in which organisms make food for themselves from complex organic substances is called autotrophic nutrition. c. The cell is enclosed by the cell membrane that surrounds a jelly-like substance called cytoplasm.

  1. Only a

  2. Both a and b

  3. Only b

  4. Only b and c

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

This is the correct option as this statement is false. 

Multiple choice

Which of the following statements is/are false?

a. Autotrophs prepare their own food by a process called photosynthesis. b. Hetrotrophic nutrition is a type of nutrition in which energy is derived from the intake and digestion of organic substances. c. Photosynthesis takes place in the spines of desert plants like cacti.

  1. Only a

  2. Both a and b

  3. Only b

  4. Both b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as this statement is false. 

Multiple choice

The mode of nutrition in plants is

  1. autotrophic

  2. heterotrophic

  3. saprophytic

  4. parasitic

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

Plants are autotrophic, meaning they can produce their own food using sunlight, water, and carbon dioxide through the process of photosynthesis.

Multiple choice

Which of the following microorganisms feed upon dead plants and animals?

  1. Bacteria and protozoa

  2. Bacteria and algae

  3. Bacteria and fungi

  4. Algae and fungi

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

Bacteria and fungi are the primary decomposers in an ecosystem. They break down complex organic matter from dead plants and animals into simpler substances, recycling nutrients back into the soil.

Multiple choice

What kind of organisms can produce their own food?

  1. Autotrophs

  2. Carnivores

  3. Omnivores

  4. Herbivores

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

Autotrophs are organisms that can produce their own food using light, water, carbon dioxide, or other chemicals, typically through photosynthesis.

Multiple choice

Which among the following statements is not true?

  1. Small animals are more in number than larger ones.

  2. Lion is a producer.

  3. Predators are usually lesser in number than their preys.

  4. Each species is limited in its total biomass by its trophic level.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A producer is an organism that produces its own food through photosynthesis, such as plants. A lion is a carnivore, which is a consumer, not a producer.

Multiple choice

Which of the following statements is/are true?

  1. Smaller animals are more in number than larger ones.

  2. Each species is limited in its total biomass by its trophic level.

  3. Predators are usually larger than their prey.

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

All the provided statements are standard ecological principles: smaller animals are generally more numerous, biomass is limited by trophic efficiency, and predators are typically larger than their prey.

Multiple choice

What is the appropriate term for herbivores?

  1. Secondary producers

  2. Primary consumers

  3. Secondary consumers

  4. Primary producers

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

Herbivores eat producers (plants) and are therefore the first level of consumers in a food chain, known as primary consumers.