Biology ยท 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

In a food web, which trophic level typically contains the highest biomass?

  1. Producers

  2. Primary Consumers

  3. Secondary Consumers

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

Producers, such as plants, have the highest biomass in a food web because they are the foundation of the food chain and convert sunlight into energy.

Multiple choice

In a food chain, which trophic level typically contains the lowest biomass?

  1. Producers

  2. Primary Consumers

  3. Secondary Consumers

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

Tertiary consumers, such as top predators, have the lowest biomass in a food chain because they are at the end of the food chain and receive energy from multiple trophic levels below them.

Multiple choice

In a food web, which trophic level typically contains the greatest diversity of species?

  1. Producers

  2. Primary Consumers

  3. Secondary Consumers

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

Secondary consumers, such as herbivores and omnivores, typically have the greatest diversity of species in a food web because they occupy a wide range of niches and feed on a variety of primary producers and primary consumers.

Multiple choice

What is the primary source of food for desert-dwelling humans?

  1. Plants

  2. Animals

  3. Insects

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

Desert-dwelling humans obtain food from plants, animals, and insects.

Multiple choice

Which of the following is NOT a major reservoir of phosphorus in the phosphorus cycle?

  1. Rocks and Minerals

  2. Oceans

  3. Living Organisms

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

The atmosphere is not a major reservoir of phosphorus in the phosphorus cycle because phosphorus is not present in significant quantities in the atmosphere.

Multiple choice

Which of the following is NOT a major reservoir of phosphorus in the phosphorus cycle?

  1. Rocks and Minerals

  2. Oceans

  3. Living Organisms

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

The atmosphere is not a major reservoir of phosphorus in the phosphorus cycle because phosphorus is not present in significant quantities in the atmosphere.

Multiple choice

What is the term for the transfer of energy from one organism to another through a food chain?

  1. Food chain

  2. Food web

  3. Trophic level

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

A food chain is the transfer of energy from one organism to another through a series of organisms, with each organism eating the one below it.

Multiple choice

What is the term for the interconnected network of food chains in an ecosystem?

  1. Food chain

  2. Food web

  3. Trophic level

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

A food web is the interconnected network of food chains in an ecosystem, showing the feeding relationships between different organisms.

Multiple choice

What is the term for the level of an organism in a food chain or food web?

  1. Food chain

  2. Food web

  3. Trophic level

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

A trophic level is the level of an organism in a food chain or food web, based on its position in the transfer of energy.

Multiple choice

What is the term for the graphical representation of the trophic levels in an ecosystem?

  1. Food chain

  2. Food web

  3. Trophic level

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

An ecological pyramid is a graphical representation of the trophic levels in an ecosystem, showing the amount of energy at each level.

Multiple choice

Which of the following is an example of a common property resource?

  1. A private car

  2. A public park

  3. A company's intellectual property

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

A public park is an example of a common property resource because it is owned by the government and is non-excludable and non-rivalrous.

Multiple choice

What is the primary source of nutrients for coral reefs?

  1. Sunlight

  2. Plankton

  3. Fish Excrement

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

Plankton, consisting of microscopic organisms, serves as the primary source of nutrients for coral reefs, providing essential food for various marine life.

Multiple choice

What is the primary source of food for most coral reef organisms?

  1. Plankton

  2. Algae

  3. Fish

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

Plankton, tiny organisms suspended in the water column, serve as the primary food source for many coral reef organisms, including fish, invertebrates, and coral polyps themselves.

Multiple choice

What is the primary source of food for filter-feeding organisms in marine ecosystems?

  1. Phytoplankton

  2. Zooplankton

  3. Benthic organisms

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

Phytoplankton are microscopic algae that serve as the primary food source for many filter-feeding organisms in marine ecosystems.

Multiple choice

What is the primary role of zooplankton in marine ecosystems?

  1. Consuming phytoplankton

  2. Providing food for larger marine animals

  3. Decomposing organic matter

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

Zooplankton play a crucial role in marine ecosystems by consuming phytoplankton, providing food for larger marine animals, and contributing to the decomposition of organic matter.