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 microorganisms in the environment?

  1. To decompose organic matter

  2. To produce oxygen

  3. To regulate climate

  4. To cause disease
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Microorganisms play a crucial role in the decomposition of organic matter, which is essential for nutrient cycling and the maintenance of ecosystem balance.

Multiple choice

Which of the following is a common type of wildlife found in floodplains?

  1. Fish

  2. Birds

  3. Mammals

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

Fish, birds, and mammals are all common types of wildlife found in floodplains, as they are adapted to the unique conditions of this ecosystem.

Multiple choice

What is the process by which animals obtain energy from food?

  1. Photosynthesis

  2. Cellular respiration

  3. Fermentation

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

Cellular respiration is the process by which animals obtain energy from food.

Multiple choice

What is the role of producers in an ecosystem?

  1. They consume other organisms.

  2. They decompose organic matter.

  3. They produce food through photosynthesis.

  4. They regulate the population of other organisms.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Producers are organisms that produce food through photosynthesis, using sunlight, water, and carbon dioxide. They are the foundation of the food chain and provide energy for all other organisms in the ecosystem.

Multiple choice

What is the role of consumers in an ecosystem?

  1. They produce food through photosynthesis.

  2. They decompose organic matter.

  3. They consume other organisms.

  4. They regulate the population of other organisms.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Consumers are organisms that consume other organisms to obtain energy and nutrients. They can be classified into primary consumers, which consume producers, and secondary consumers, which consume primary consumers.

Multiple choice

What is the role of decomposers in an ecosystem?

  1. They produce food through photosynthesis.

  2. They consume other organisms.

  3. They decompose organic matter.

  4. They regulate the population of other organisms.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Decomposers are organisms that break down dead organisms and organic matter into simpler substances, which can then be used by other organisms in the ecosystem. They play a crucial role in nutrient cycling and maintaining the balance of the ecosystem.

Multiple choice

Which of the following is an example of a trophic level in an ecosystem?

  1. Producers

  2. Consumers

  3. Decomposers

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

Trophic levels are the different levels of an ecosystem in which organisms obtain energy and nutrients. Producers, consumers, and decomposers are all examples of trophic levels.

Multiple choice

Which of the following is an example of herbivory?

  1. A deer eating grass

  2. A lion eating a zebra

  3. A tapeworm living in a human intestine

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

In herbivory, an animal eats plants. In this case, the deer eats grass.

Multiple choice

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

  1. A beaver building a dam

  2. A lion eating a zebra

  3. A tapeworm living in a human intestine

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

A keystone species is a species that has a disproportionately large impact on its ecosystem relative to its abundance. In this case, the beaver's dam creates a wetland habitat that supports a variety of other species.

Multiple choice

Which of the following is an example of a trophic cascade?

  1. A decrease in the population of wolves leading to an increase in the population of deer

  2. A lion eating a zebra

  3. A tapeworm living in a human intestine

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

A trophic cascade is a series of interactions between species at different trophic levels. In this case, the decrease in the population of wolves (top predators) leads to an increase in the population of deer (herbivores), which in turn leads to a decrease in the population of plants (producers).

Multiple choice

Which of the following is an example of a herbivorous interaction?

  1. A deer eating grass

  2. A lion eating a zebra

  3. A remora fish attaching itself to a shark

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

In a herbivorous interaction, an animal eats plants. In this case, the deer eats grass.

Multiple choice

Which of the following is not a type of biogeographic research method?

  1. Comparative biogeography

  2. Ecological biogeography

  3. Experimental biogeography

  4. Historical biogeography
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Experimental biogeography is not a type of biogeographic research method. It is a branch of ecology that studies the effects of environmental factors on the distribution of organisms.

Multiple choice

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

  1. Sea Otters

  2. Wolves

  3. Coral Reefs

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

Sea otters, wolves, and coral reefs are all examples of keystone species that play a crucial role in maintaining ecological stability.

Multiple choice

What is the primary diet of a panda bear?

  1. Bamboo

  2. Fish

  3. Meat

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

Panda bears are primarily herbivores, with bamboo constituting the majority of their diet.

Multiple choice

Which of the following is a primary producer in coastal and marine ecosystems?

  1. Phytoplankton

  2. Zooplankton

  3. Fish

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

Phytoplankton are microscopic algae that are the primary producers in coastal and marine ecosystems. They use sunlight to convert carbon dioxide and water into glucose and oxygen through photosynthesis.