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

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.

Multiple choice

What is the primary role of lichens in the carbon cycle?

  1. Carbon sequestration

  2. Carbon release

  3. Carbon cycling

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lichens play a significant role in the carbon cycle by sequestering carbon dioxide from the atmosphere and storing it in their tissues. This process helps regulate the global carbon balance and mitigate climate change.

Multiple choice

What is the term for the practice of abstaining from meat consumption?

  1. Vegetarianism

  2. Veganism

  3. Pescetarianism

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

Vegetarianism is the practice of abstaining from the consumption of meat.

Multiple choice

Which of these is a primary producer in riverine ecosystems?

  1. Phytoplankton

  2. Zooplankton

  3. Benthic invertebrates

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

Phytoplankton are microscopic algae that form the base of the food web in riverine ecosystems, converting sunlight into energy through photosynthesis.

Multiple choice

What is the primary source of food for most coral reef organisms?

  1. Phytoplankton

  2. Zooplankton

  3. Coral polyps

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

Phytoplankton are microscopic algae that form the base of the food web in coral reefs. They are consumed by zooplankton, which are in turn eaten by coral polyps and other reef organisms.

Multiple choice

What is the main type of food consumed by coral reef fish?

  1. Phytoplankton

  2. Zooplankton

  3. Coral polyps

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

Coral reef fish are primarily carnivorous and feed on a variety of other fish, as well as invertebrates such as shrimp, crabs, and mollusks.

Multiple choice

What is the main type of food consumed by sea urchins in coral reefs?

  1. Algae

  2. Seagrass

  3. Coral polyps

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

Sea urchins are primarily herbivorous and feed on algae. They play an important role in maintaining the health of coral reefs by grazing on algae that can overgrow and smother corals.

Multiple choice

What is the main type of food consumed by sea cucumbers in coral reefs?

  1. Algae

  2. Seagrass

  3. Coral polyps

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

Sea cucumbers are primarily detritivores and feed on detritus, which is dead organic matter. They play an important role in maintaining the health of coral reefs by recycling nutrients back into the ecosystem.

Multiple choice

How does consuming meat contribute to both carbon footprint and water consumption?

  1. Meat production requires large amounts of land and water

  2. Meat processing and transportation emit greenhouse gases

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Meat production requires significant land and water resources, and the processing and transportation of meat products also contribute to greenhouse gas emissions.

Multiple choice

Which of the following is a primary producer in an ecosystem?

  1. Herbivores

  2. Carnivores

  3. Decomposers

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

Plants are primary producers because they use sunlight, water, and carbon dioxide to produce their own food through the process of photosynthesis.

Multiple choice

Which of the following is a keystone species, playing a crucial role in maintaining the balance of an ecosystem?

  1. Polar bears

  2. Bees

  3. Elephants

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

Bees are keystone species because they play a vital role in pollination, which is essential for the reproduction of many plants.