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

What is the concept of landscape resilience in landscape ecology?

  1. The ability of a landscape to resist or recover from disturbance.

  2. The ability of a landscape to maintain its structure and function in the face of disturbance.

  3. The ability of a landscape to adapt to changing environmental conditions.

  4. The ability of a landscape to increase its productivity in the face of disturbance.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Landscape resilience in landscape ecology refers to the ability of a landscape to resist or recover from disturbance, including the ability to maintain its structure and function in the face of disturbance.

Multiple choice

What is the primary food source for polar bears?

  1. Fish

  2. Seals

  3. Walruses

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

Polar bears primarily hunt seals for food.

Multiple choice

What is the primary food source for walruses?

  1. Clams

  2. Fish

  3. Seaweed

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

Walruses primarily feed on clams and other benthic invertebrates.

Multiple choice

What is the primary food source for Arctic hares?

  1. Grasses

  2. Leaves

  3. Twigs

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

Arctic hares primarily feed on grasses and other vegetation found in the Arctic tundra.

Multiple choice

Which organism occupies the highest trophic level in a typical food chain?

  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 are at the highest trophic level as they consume secondary consumers.

Multiple choice

The transfer of energy from one trophic level to the next is known as:

  1. Energy Flow

  2. Energy Cycle

  3. Trophic Transfer

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

Trophic transfer refers to the movement of energy from one trophic level to the next.

Multiple choice

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

  1. Grass

  2. Lion

  3. Eagle

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

Primary consumers are herbivores that consume producers (plants).

Multiple choice

Which trophic level consists of organisms that decompose organic matter and return nutrients to the environment?

  1. Producers

  2. Primary Consumers

  3. Secondary Consumers

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

Decomposers break down organic matter and recycle nutrients back into the ecosystem.

Multiple choice

The amount of energy transferred from one trophic level to the next is typically around:

  1. 10%

  2. 25%

  3. 50%

  4. 75%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Only about 10% of the energy available at one trophic level is transferred to the next trophic level.

Multiple choice

Which of the following is an example of a detritivore?

  1. Hawk

  2. Earthworm

  3. Shark

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

Detritivores feed on dead organic matter.

Multiple choice

The term 'trophic cascade' refers to:

  1. The transfer of energy from one trophic level to the next

  2. The impact of a change in one trophic level on other trophic levels

  3. The cycling of nutrients through an ecosystem

  4. The process of decomposition
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A trophic cascade is the indirect effect of a change in the population of one species on other species in the food chain.

Multiple choice

Which of the following is an example of a food web?

  1. Grass -> Grasshopper -> Bird

  2. Grass -> Grasshopper -> Bird -> Hawk

  3. Grass -> Grasshopper -> Bird -> Hawk -> Fox

  4. Grass -> Grasshopper -> Bird -> Hawk -> Fox -> Decomposers
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A food web is a complex network of interconnected food chains.

Multiple choice

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

  1. Grass

  2. Deer

  3. Hawk

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

Secondary consumers are carnivores that consume primary consumers.

Multiple choice

Which of the following is an example of a producer?

  1. Grass

  2. Lion

  3. Eagle

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

Producers are organisms that can make their own food from inorganic molecules.

Multiple choice

The transfer of energy from one trophic level to the next is often represented by:

  1. Food Chains

  2. Food Webs

  3. Energy Pyramids

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

Energy pyramids graphically represent the amount of energy at each trophic level.