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

What is the mode of nutrition in Amoeba known as?

  1. Saprotrophic

  2. Holozoic

  3. Parasitic

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

Amoeba exhibits holozoic nutrition, where it ingests solid food particles through phagocytosis, forming food vacuoles where intracellular digestion occurs. Saprotrophic nutrition involves feeding on dead organic matter externally, parasitic nutrition involves living on a host organism, and ingestion is merely the process of taking in food, not a mode of nutrition.

Multiple choice

The organisms which consume ready made food prepared by plants are called

  1. autotrophs

  2. heterotrophs

  3. chemoautotrophs

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

Autotrophs are the living organisms, which make their own food by using inorganic raw materials. Heterotrophs are the organisms which depend on autotrophs for their nutrition requirements. Other organisms which use chemical energy are called chemoautotrophs. Host is that organism in/on the body of which another organism/parasite lives and draws its nutrition. 

Multiple choice

How is water loss reduced in desert plants?

  1. Thick sclerenchymatous layer over epidermis of leaves prevents water loss.

  2. The outermost surface of epidermis secretes suberin, which is waterproof.

  3. Cutin secreted by the outermost surface of epidermis is waterproof.

  4. Leaves of such plants secrete oil to prevent water loss.

  5. The outermost surface of epidermis secretes lignin, which is waterproof.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cutin helps in reduction of water loss in desert plants as it is waxy and water-resistant.

Multiple choice

Nocturnal animals are

  1. the organisms which can prepare their own food

  2. the animals which remain active during day

  3. the animals which remain active during night and feed during night

  4. heterotrophs

  5. xerophytes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The animals which remain active during night and feed during night are nocturnal animals.

Multiple choice

Which of the following is not an adaptation of desert plants?

  1. They lose very little water through transpiration.

  2. The leaves are either absent or very small.

  3. The leaves of these plants are spine-shaped.

  4. Photosynthesis is often carried out by stems.

  5. The trees are cone-shaped and have sloping branches.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

It is a property of the plants found in mountains.