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 term for the transfer of energy from one organism to another through a food chain?

  1. Food chain

  2. Food web

  3. Trophic level

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

A food chain is the transfer of energy from one organism to another through a series of organisms, with each organism eating the one below it.

Multiple choice

What is the term for the interconnected network of food chains in an ecosystem?

  1. Food chain

  2. Food web

  3. Trophic level

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

A food web is the interconnected network of food chains in an ecosystem, showing the flow of energy and nutrients between different organisms.

Multiple choice

What is the term for the position of an organism in a food chain or food web?

  1. Food chain

  2. Food web

  3. Trophic level

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

Trophic level is the position of an organism in a food chain or food web, based on its feeding relationships.

Multiple choice

What is the term for the graphical representation of the trophic levels in an ecosystem?

  1. Food chain

  2. Food web

  3. Trophic level

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

An ecological pyramid is a graphical representation of the trophic levels in an ecosystem, showing the flow of energy and biomass from one level to the next.

Multiple choice

Which of the following is an example of a herbivore that feeds on plants?

  1. Deer

  2. Aphids

  3. Bees

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

Deer are herbivores that feed on plants.

Multiple choice

Which of the following is an example of a plant adaptation that reduces herbivory?

  1. Producing toxins

  2. Growing thorns

  3. Producing nectar

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

Growing thorns is an example of a plant adaptation that reduces herbivory, as it makes the plant less palatable to herbivores.

Multiple choice

Which of the following is NOT a regulating service provided by grasslands?

  1. Water filtration

  2. Carbon sequestration

  3. Erosion control

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

Pollination is not a regulating service provided by grasslands. Grasslands primarily provide services related to water quality and quantity management, such as water filtration, carbon sequestration, and erosion control.

Multiple choice

What is the primary source of nutrients for salt marshes?

  1. Fertilizers from agricultural runoff

  2. Atmospheric deposition

  3. Tidal exchange

  4. Groundwater discharge
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Salt marshes receive nutrients primarily through tidal exchange, which brings in nutrients from the ocean.

Multiple choice

Which animal species is known for its role in creating and maintaining salt marsh habitats?

  1. Oysters

  2. Crabs

  3. Mussels

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

Oysters play a crucial role in salt marsh ecosystems by filtering water, creating habitats for other species, and stabilizing sediments.

Multiple choice

Which of the following is NOT a way that insects can contribute to the decomposition of organic matter?

  1. Eating dead plants and animals

  2. Burrowing in the soil

  3. Producing enzymes that break down organic matter

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

Insects do not photosynthesize, as they do not have chlorophyll.

Multiple choice

Which of the following is NOT a common type of wetland animal:

  1. Frogs

  2. Birds

  3. Fish

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

Lizards are not typically associated with wetlands as they prefer drier habitats.

Multiple choice

What is the primary food source for dung beetles, contributing to their ecological role as nature's recyclers?

  1. Fruit

  2. Nectar

  3. Dung

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

Dung beetles primarily feed on animal dung, playing a crucial role in breaking down and recycling organic matter in the African ecosystem. They help decompose dung, reducing its impact on the environment and contributing to nutrient cycling.

Multiple choice

What is the primary food source for termites, contributing to their ecological role as decomposers in the African ecosystem?

  1. Fruit

  2. Nectar

  3. Wood

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

Termites primarily feed on wood, playing a significant role in the decomposition of dead plant material in the African ecosystem. They break down wood into smaller particles, aiding in nutrient cycling and contributing to the overall health of the environment.

Multiple choice

What is the primary food source for ants, contributing to their ecological role as scavengers and decomposers in the African ecosystem?

  1. Fruit

  2. Nectar

  3. Insects

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

Ants primarily feed on insects, playing a crucial role as scavengers and decomposers in the African ecosystem. They scavenge for dead insects and other small animals, breaking them down into smaller particles and aiding in nutrient cycling. This helps maintain the balance of the ecosystem and contributes to the overall health of the environment.

Multiple choice

What is the primary food source for grasshoppers, contributing to their ecological role as herbivores in the African ecosystem?

  1. Fruit

  2. Nectar

  3. Leaves

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

Grasshoppers primarily feed on leaves, playing a crucial role as herbivores in the African ecosystem. They consume a wide variety of leaves from grasses, shrubs, and trees, contributing to the breakdown of plant material and nutrient cycling. Grasshoppers help maintain the balance of the ecosystem by keeping plant populations in check.