Biology · 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

_____is an ability of the organism to prepare its own food.

  1. Autotrophic nature

  2. Heterotrophic nature

  3. Allotrophic nature

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

Autotrophic organisms, such as plants, can synthesize their own food using sunlight, water, and carbon dioxide. Heterotrophs must consume other organisms for energy.

Multiple choice

All food chains begin with green plants called______.

  1. composers

  2. producers

  3. decomposers

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

In an ecosystem, green plants are called producers because they produce their own food through photosynthesis, forming the base of the food chain.

Multiple choice

The ability of the organism to prepare its own food.

  1. Autotrophic

  2. Heterotrophic

  3. Diastrophic

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

Autotrophic organisms are those capable of synthesizing their own food from simple inorganic substances, such as through photosynthesis.

Multiple choice

Which of the following statements regarding the energy flow in food chain is wrong?

  1. Energy loss in a food chain occurs in the expulsion of undigested food by excretion or regurgitation.

  2. Energy can be reused definitely, though matter circulates.

  3. With the decomposers, no energy is left for recycling.

  4. In the animals, the chemical energy is used as mechanical energy and heat.

  5. Energy is absorbed into the secondary consumers through the process of digestion.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Energy cannot be reused indefinitely, though matter circulates. Energy from the sun or the solar energy is converted by the photosynthetic producers into chemical energy in the form of carbohydrates in plants.

Multiple choice

Regarding the trophic levels of a food web, select the statement which is incorrect.

  1. The primary predators do not feed on living creatures.

  2. The intermediate trophic levels are filled with carnivorous species like lion, tiger etc.

  3. The detritivores are considered at the zero level of the food chain.

  4. At the top level are the apex predatores.

  5. The basal species may consist of the detritivores.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The intermediate trophic levels are filled with omnivorous species which feed on more than one trophic level and they cause the flow of energy through various food pathways from the basal species.