Biology ยท 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 is an example of a secondary consumer?

  1. Mice

  2. Owls

  3. Sharks

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

Secondary consumers are carnivores that feed on primary consumers. Mice, for example, feed on grasshoppers, making them secondary consumers.

Multiple choice

What is the role of decomposers in an ecosystem?

  1. Produce Energy

  2. Consume Energy

  3. Decompose Organic Matter

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

Decomposers, such as bacteria and fungi, break down dead organisms and organic matter, releasing nutrients back into the environment. This process is essential for nutrient cycling and the overall functioning of an ecosystem.

Multiple choice

Which of the following is an example of a tertiary consumer?

  1. Eagles

  2. Wolves

  3. Rabbits

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

Tertiary consumers are carnivores that feed on secondary consumers. Eagles, for example, feed on hawks, making them tertiary consumers.

Multiple choice

What is the term used to describe the highest trophic level in an ecosystem?

  1. Primary Consumers

  2. Secondary Consumers

  3. Tertiary Consumers

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

Top predators are organisms that occupy the highest trophic level in an ecosystem. They have no natural predators and are often characterized by their large size and powerful hunting abilities.

Multiple choice

Which of the following is an example of a detritivore?

  1. Vultures

  2. Earthworms

  3. Snakes

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

Detritivores are organisms that feed on dead organic matter. Earthworms, for example, feed on decaying plant and animal matter, breaking it down and releasing nutrients back into the soil.

Multiple choice

Which of the following is an example of a producer in a marine ecosystem?

  1. Phytoplankton

  2. Zooplankton

  3. Fish

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

Phytoplankton are microscopic algae that are the primary producers in marine ecosystems. They use sunlight to convert carbon dioxide and water into glucose through photosynthesis, creating the energy that flows through the marine food web.

Multiple choice

What is the difference between a food chain and a food web?

  1. A food chain is a linear sequence of organisms through which nutrients and energy pass, while a food web is a more complex network of interconnected food chains.

  2. A food chain is a linear sequence of organisms through which nutrients and energy pass, while a food web is a more complex network of interconnected food chains.

  3. A food chain is a linear sequence of organisms through which nutrients and energy pass, while a food web is a more complex network of interconnected food chains.

  4. A food chain is a linear sequence of organisms through which nutrients and energy pass, while a food web is a more complex network of interconnected food chains.
Reveal answer Fill a bubble to check yourself
A,B,C,D Correct answer
Explanation

A food chain is a linear sequence of organisms through which nutrients and energy pass, while a food web is a more complex network of interconnected food chains.

Multiple choice

What is the term used to describe the transfer of energy and nutrients from one organism to another through a food chain?

  1. Trophic levels

  2. Ecological pyramids

  3. Food webs

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

Food webs are complex networks of interconnected food chains, showing how energy and nutrients flow through an ecosystem.

Multiple choice

Which of the following is NOT a type of trophic level in an ecosystem?

  1. Producers

  2. Primary consumers

  3. Secondary consumers

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

Apex predators are not a trophic level, but rather a type of organism that occupies the highest trophic level in a food chain, with no natural predators.

Multiple choice

Which of the following is NOT a key role of decomposers in an ecosystem?

  1. Breaking down organic matter

  2. Releasing nutrients into the environment

  3. Producing oxygen

  4. Consuming primary producers
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Decomposers do not produce oxygen, but rather consume oxygen during the decomposition process.

Multiple choice

What is the term used to describe the process by which plankton are grazed upon by larger organisms?

  1. Predation

  2. Grazing

  3. Ingestion

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

Grazing is the process by which plankton are consumed by larger organisms, such as fish and whales.

Multiple choice

Which type of plankton is known for its ability to filter-feed?

  1. Copepods

  2. Diatoms

  3. Krill

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

Copepods are a type of zooplankton that are known for their ability to filter-feed on smaller organisms.

Multiple choice

What is the term used to describe the process by which plankton are consumed by larger organisms?

  1. Predation

  2. Grazing

  3. Ingestion

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

Grazing is the process by which plankton are consumed by larger organisms, such as fish and whales.

Multiple choice

Which type of plankton is known for its ability to filter-feed?

  1. Copepods

  2. Diatoms

  3. Krill

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

Copepods are a type of zooplankton that are known for their ability to filter-feed on smaller organisms.

Multiple choice

Which of the following is an example of a functional group?

  1. All plants that grow in a forest

  2. All animals that eat insects

  3. All birds that live in a city

  4. All fish that live in a river
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A functional group is a group of organisms that share a common function or role in an ecosystem. All animals that eat insects are an example of a functional group because they all share the function of consuming insects.