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

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

Which of the following is the most important provisioning service for humans?

  1. Food

  2. Fiber

  3. Water

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

Food is the most important provisioning service for humans because it provides the energy and nutrients we need to survive.

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 not an example of a supporting service?

  1. Soil formation

  2. Nutrient cycling

  3. Water cycling

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

Food production is a provisioning service, not a supporting service. Supporting services are the underlying processes that make it possible for provisioning, regulating, and cultural services to exist.

Multiple choice

Which of the following is NOT an example of a functional trait?

  1. Body size

  2. Diet

  3. Habitat preference

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

Species richness is not a functional trait because it does not describe the role or function of a species in an ecosystem.

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.

Multiple choice

Which of the following is an example of a species that has a high carrying capacity?

  1. Humans

  2. Rats

  3. Bacteria

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

Humans, rats, and bacteria all have high carrying capacities because they are able to adapt to a wide range of environmental conditions and are able to reproduce quickly.