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 secondary producer in an aquatic ecosystem?

  1. Phytoplankton

  2. Zooplankton

  3. Fish

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

Zooplankton are secondary producers in an aquatic ecosystem because they consume phytoplankton, which are primary producers, and use the energy to produce their own biomass.

Multiple choice

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

  1. Cactus

  2. Lizard

  3. Scorpion

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

Lizards are secondary producers in a desert ecosystem because they consume insects, which are primary producers, and use the energy to produce their own biomass.

Multiple choice

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

  1. Lichen

  2. Caribou

  3. Wolf

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

Caribou are secondary producers in a tundra ecosystem because they consume plants, which are primary producers, and use the energy to produce their own biomass.

Multiple choice

Which of the following is an example of a secondary producer in a kelp forest ecosystem?

  1. Kelp

  2. Sea urchin

  3. Sea otter

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

Sea urchins are secondary producers in a kelp forest ecosystem because they consume kelp, which is a primary producer, and use the energy to produce their own biomass.

Multiple choice

Which marine ecosystem is particularly efficient at sequestering carbon dioxide from the atmosphere?

  1. Coral reefs

  2. Mangrove forests

  3. Kelp forests

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

Mangrove forests are highly efficient at sequestering carbon dioxide from the atmosphere due to their high productivity and the accumulation of organic matter in their sediments.

Multiple choice

Which of the following is NOT a type of marine plant?

  1. Seaweed

  2. Kelp

  3. Phytoplankton

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

Coral is not a marine plant, but is actually a type of colonial animal that forms hard skeletons.

Multiple choice

Which of the following is not a major component of the phosphorus cycle?

  1. Atmosphere

  2. Hydrosphere

  3. Lithosphere

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

The atmosphere is not a major component of the phosphorus cycle because it does not contain a significant amount of phosphorus.

Multiple choice

Which organism occupies the first trophic level in an ecosystem?

  1. Primary Consumers

  2. Secondary Consumers

  3. Tertiary Consumers

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

Producers, such as plants, are the foundation of an ecosystem's food chain. They use sunlight to convert carbon dioxide and water into glucose through photosynthesis, creating the energy that flows through the ecosystem.

Multiple choice

What is the term used to describe the transfer of energy from one trophic level to the next?

  1. Energy Flow

  2. Energy Transfer

  3. Trophic Transfer

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

Trophic transfer refers to the process by which energy is passed from one trophic level to the next in an ecosystem. This transfer occurs when organisms consume other organisms, transferring the energy stored in the consumed organism to the consumer.

Multiple choice

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

  1. Grasshoppers

  2. Snakes

  3. Hawks

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

Primary consumers are herbivores that feed directly on producers. Grasshoppers, for example, feed on plants, making them primary consumers.

Multiple choice

What percentage of energy is typically transferred from one trophic level to the next?

  1. 10%

  2. 20%

  3. 50%

  4. 90%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The energy transfer efficiency between trophic levels is typically around 10%. This means that only 10% of the energy stored in an organism at one trophic level is transferred to the organisms at the next trophic level.

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.