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 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 the following is not a major emerging trend in biogeography?

  1. The use of molecular data to study biogeographic patterns

  2. The development of new statistical methods for analyzing biogeographic data

  3. The integration of biogeographic data with other types of data, such as climate data

  4. The use of computer models to simulate biogeographic processes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Computer models are not a major emerging trend in biogeography. They are a well-established tool that has been used for decades to study biogeographic patterns and processes.

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

Which of the following is a common method for studying the vegetation of a geomorphic site?

  1. Transect survey

  2. Quadrat survey

  3. Point-intercept survey

  4. Line-intercept survey
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A quadrat survey involves placing a quadrat (a square or rectangular frame) at regular intervals along a transect or in a random pattern across the site. The vegetation within each quadrat is then identified and counted.

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

Which of the following is an example of a keystone species?

  1. Sea otter

  2. Coral

  3. Monarch butterfly

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

Sea otter is an example of a keystone species due to its role in maintaining kelp forests and regulating marine ecosystems.

Multiple choice

What is the term for the natural, instinctive behavior of animals in their natural habitat?

  1. Ethoecology

  2. Ethology

  3. Ecology

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

Ethology is the study of animal behavior, including their natural, instinctive behaviors in their natural habitat.

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.

Multiple choice

Which of the following is a potential benefit of using insects as a food source?

  1. High protein content

  2. Low environmental impact

  3. Both of the above

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

Insects are a promising alternative food source due to their high protein content and low environmental impact.

Multiple choice

Which of the following is NOT a common type of animal found in riverine ecosystems?

  1. Fish

  2. Amphibians

  3. Reptiles

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

Kangaroos are not typically found in riverine ecosystems, as they are adapted to arid and open habitats.