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 trophic level typically has the shortest lifespan?

  1. Producers

  2. Primary Consumers

  3. Secondary Consumers

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

Top predators, being at the highest trophic level, typically have the shortest lifespan due to factors such as limited resources, competition, and exposure to toxins.

Multiple choice

Which trophic level typically has the highest species diversity?

  1. Producers

  2. Primary Consumers

  3. Secondary Consumers

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

Primary consumers, being the first level of consumers, typically have the highest species diversity, as they utilize a wide range of producers for their energy and nutrient needs.

Multiple choice

Which of the following is a secondary producer?

  1. Grass

  2. Deer

  3. Lion

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

Secondary producers are organisms that consume primary producers and use their energy to produce their own biomass.

Multiple choice

Which of the following factors can affect secondary production?

  1. Availability of food

  2. Temperature

  3. Predation

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

Secondary production can be affected by a variety of factors, including the availability of food, temperature, and predation. When food is scarce, secondary producers may have to compete for resources, which can lead to a decrease in production. Temperature can also affect secondary production, as some organisms are more active and productive in warmer or cooler temperatures. Predation can also reduce secondary production, as predators consume secondary producers.

Multiple choice

What is the role of secondary producers in an ecosystem?

  1. They convert solar energy into chemical energy.

  2. They transfer energy from primary producers to higher trophic levels.

  3. They recycle nutrients back into the environment.

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

Secondary producers play a vital role in ecosystems by converting solar energy into chemical energy, transferring energy from primary producers to higher trophic levels, and recycling nutrients back into the environment.

Multiple choice

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

  1. Grass

  2. Grasshopper

  3. Snake

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

Grasshoppers are secondary producers in a grassland ecosystem because they consume grass, which is a primary producer, and use the energy to produce their own biomass.

Multiple choice

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

  1. Tree

  2. Deer

  3. Wolf

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

Deer are secondary producers in a forest 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 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 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.