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 difference between a food chain and a food web?

  1. A food chain is a linear sequence of organisms, while a food web is a complex network of interconnected food chains.

  2. A food chain is a closed system, while a food web is an open system.

  3. A food chain is more stable than a food web.

  4. A food chain is less diverse than a food web.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A food chain is a linear sequence of organisms, where each organism eats the one below it. A food web is a complex network of interconnected food chains, where organisms can eat multiple different things and be eaten by multiple different things.

Multiple choice

Which of the following is an example of a cultural service provided by deserts?

  1. Mining

  2. Solar energy production

  3. Spiritual and religious experiences

  4. Water storage
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Deserts provide a variety of cultural services, including spiritual and religious experiences. Mining, solar energy production, and water storage are all provisioning or regulating services.

Multiple choice

Which of the following is an example of a functional group?

  1. All carnivores in an ecosystem

  2. All herbivores in an ecosystem

  3. All plants in an ecosystem

  4. All animals in an ecosystem
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A functional group is a group of species that share similar functional traits and perform similar roles in an ecosystem. All carnivores in an ecosystem form a functional group because they share the trait of being predators and they perform the role of consuming prey.

Multiple choice

Which of the following is an example of a functional group?

  1. All plants

  2. All animals

  3. All carnivores

  4. All herbivores
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A functional group is a group of organisms that share similar traits and perform similar functions in an ecosystem. All carnivores, for example, share the trait of eating meat and perform the function of consuming other animals.

Multiple choice

What is the term used to describe the process by which phytoplankton cells are grazed by zooplankton?

  1. Grazing

  2. Predation

  3. Herbivory

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

Grazing is the term used to describe the process by which phytoplankton cells are consumed by zooplankton. This process is an important part of the marine food web.

Multiple choice

According to evolutionary theory, competition is driven by the need to:

  1. Increase genetic diversity

  2. Secure resources

  3. Promote cooperation

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

Competition is driven by the need to secure resources such as food, territory, and mates, which are essential for survival and reproduction.

Multiple choice

In a competitive environment, what is the term for the process by which individuals or groups adapt to improve their chances of success?

  1. Adaptation

  2. Evolution

  3. Natural selection

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

Adaptation is the process by which individuals or groups change their behavior or characteristics to better suit their environment and improve their chances of survival and success.

Multiple choice

Which of the following is an example of parasitism?

  1. A bee pollinating a flower

  2. A tapeworm living in a human intestine

  3. A mistletoe growing on a tree

  4. A cuckoo laying its eggs in another bird's nest
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In parasitism, one species benefits at the expense of the other. In the case of a tapeworm living in a human intestine, the tapeworm obtains nutrients from the host's digestive system, while the host suffers from malnutrition and other health issues.

Multiple choice

Which of the following is an example of amensalism?

  1. A bee pollinating a flower

  2. A tapeworm living in a human intestine

  3. A mistletoe growing on a tree

  4. A penicillin fungus producing antibiotics
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In amensalism, one species is harmed while the other is unaffected. In the case of a penicillin fungus producing antibiotics, the antibiotics produced by the fungus inhibit the growth of other microorganisms, while the fungus itself is unaffected.

Multiple choice

Which of the following is an example of parasitism?

  1. A tapeworm living in a human intestine

  2. A bee pollinating a flower

  3. A sea anemone living on a coral reef

  4. A mistletoe plant growing on a tree
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Parasitism is a symbiotic relationship in which one organism benefits from the other at the expense of the other. In the case of a tapeworm living in a human intestine, the tapeworm gets nutrients from the human's food, while the human is harmed by the tapeworm.

Multiple choice

Which of the following is an example of amensalism?

  1. A tree shading out a smaller plant

  2. A lion preying on a zebra

  3. A bee pollinating a flower

  4. A tapeworm living in a human intestine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Amensalism is a symbiotic relationship in which one organism is harmed by the other. In the case of a tree shading out a smaller plant, the smaller plant is harmed by the tree's shade.

Multiple choice

What are some examples of functional traits?

  1. Body size

  2. Diet

  3. Habitat

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

Functional traits are measurable characteristics of organisms that influence their ecological roles. Examples of functional traits include body size, diet, habitat, and behavior.

Multiple choice

What are some examples of commensalism in the wetland?

  1. The cattails that grow in marshes

  2. The frogs that live in ponds

  3. The alligators that live in swamps

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

There are many examples of commensalism in the wetland, including the cattails that grow in marshes, the frogs that live in ponds, and the alligators that live in swamps.

Multiple choice

What is the primary role of producers in an ecosystem?

  1. Decomposing organic matter

  2. Consuming other organisms

  3. Converting sunlight into energy

  4. Regulating the flow of water
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Producers, such as plants, use sunlight through photosynthesis to convert carbon dioxide and water into energy-rich compounds.

Multiple choice

Which type of organism occupies the highest trophic level in an ecosystem?

  1. Producers

  2. Primary consumers

  3. Secondary consumers

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

Apex predators are at the top of the food chain and have no natural predators.