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

Highest consumer in a food chain

  1. Primary Consumer

  2. Secondary Consumer

  3. Detritus Consumer

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

In a food chain, the tertiary consumer is the organism at the top level, which eats secondary consumers.

Multiple choice

Organisms, like large fish, that eat small fish.

  1. Secondary Consumer

  2. Decomposer

  3. Secondary Producer

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

A secondary consumer is an organism that eats primary consumers. Since primary consumers eat producers (like algae), a fish that eats smaller fish is a secondary consumer.

Multiple choice

Organisms, like small fish, that eat algae.

  1. Primary Consumer

  2. Decomposer

  3. Producer

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

A primary consumer is an organism that feeds on producers. Since algae are producers, small fish that eat them are primary consumers.

Multiple choice

An organism that absorbs nutrients from the environment.

  1. Fungi

  2. Algae

  3. Protozoa

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

Fungi are heterotrophic organisms that absorb nutrients from their environment by secreting digestive enzymes and absorbing the breakdown products, unlike algae which photosynthesize.

Multiple choice

What must organisms be able to obtain in order to survive?

  1. energy and heat

  2. heat and cold

  3. DNA and water

  4. energy(food), air, shelter, and water
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Living organisms require specific resources to maintain life processes, including energy (food), water, air for respiration, and shelter for protection.

Multiple choice

The mode of nutrition found in fungi is:

  1. Parasitic nutrition

  2. Holozoic nutrition

  3. Autotrophic nutrition

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

Fungi are heterotrophs that secrete digestive enzymes onto organic matter and absorb the resulting nutrients, a process known as saprotrophic nutrition.

Multiple choice

Select the correct statement -

  1. Hetrotrophs make their food

  2. Heterotrophs utilize solar energy to make food

  3. Heterotrophs do not make their own food

  4. Heterotrophs are able to convert carbon dioxide and water into carbohydrate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Heterotrophs are organisms that cannot synthesize their own food from inorganic sources and must consume other organisms to obtain energy.

Multiple choice

A single food chain exists in forest

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ecosystems contain complex food webs, not just a single food chain. Multiple organisms interact and consume various other organisms, creating a web of energy transfer.

Multiple choice

Which of the following is a producer?

  1. Green plants

  2. Herbivore

  3. Carnivore

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

Producers are organisms that produce their own food using sunlight, water, and carbon dioxide; green plants are the primary example.