Biology · Environmental Studies

Ecosystem Nutrition and Energy Flow

1,093 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 biology what do animals eat? introduction to animal nutrition food for life types of nutrition

 The animals that feed by straining suspended matter and food particles from water is known as

  1. Filter feeders

  2. Detritivores

  3. Fungivores

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Suspended food (phytoplankton, zooplankton, algae and other water-borne nutrients and particles) are trapped in the mucus of a gill, and from there are transported to the mouth, where they are eaten, digested and expelled as faeces or pseudofeces.


So, the correct option is 'Filter feeders'.

Multiple choice biology what do animals eat? introduction to animal nutrition food for life types of nutrition


Animals that feed discontinuously

  1. exhibit extremely rapid digestion

  2. must have digestive tracts that permit storage

  3. are able to avoid predators by limiting their feeding time

  4. both (b) and (c)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Continuous feeders: That must "eat" constantly because the food is taken in and then pushed out soon afterwards are called continuous feeders. Most of these animals either are permanently attached to something (such as clams or mussels) or are very slow moving.
  • Discontinuous feeders: Consume larger meals and store the ingested food for later digestion. These animals generally are more active and can avoid predators. Hence, the animals that feed discontinuously must have digestive tracts that permit storage and are able to avoid predators by limiting their feeding time.
So, the correct answer is 'both (b) and (c).

Multiple choice biology what do animals eat? introduction to animal nutrition food for life types of nutrition

Which functional feeding groups are involved in the process of in-stream physical breakdown of coarse material into fine particulate organic matter?

  1. Collector filterers

  2. Shredders

  3. Grazers

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

Shredders are functional feeding groups in aquatic ecology that break down coarse particulate organic matter (CPOM) into fine particulate organic matter (FPOM).

Multiple choice evs roots and leaves plant adaptation and modification leaves leaf modification root, stem, and leaves

Insectivorous plants commonly grow in areas where soil is deficient in

  1. Carbon

  2. Nitrogen

  3. Potassium

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

The insectivorous plants are the carnivorous plants which feed on the insects. These plants have adapted to grow in the extreme conditions of the soil such as acidic pH. Generally, these plants are known to grow in the soil which is deficient in the mineral nutrients due to the presence of acid. The plant can grow in the soil which have low levels of nitrogen. 

Thus, the correct answer is option B. 

Multiple choice respiration-the energy producing system experiments on photosynthesis cellular respiration introduction to respiration

The respiratory loss of producers, herbivores and carnivores are respectively

  1. 105, 20%,30%

  2. 20%, 30%, 60%

  3. 20%, 40%, 80%

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The amount of energy and biomass in the producers of the food chain is 100%. At each successive level, the energy and biomass are lost. The organisms at each level use energy for respiration. This is called respiration loss. When producers are eaten by the herbivores, there is 20% respiratory loss as producers use about 20% of energy in the form of respiration. Similarly, when herbivores are eaten by carnivores, there is 30% respiratory loss as 30% of energy is used by herbivores. Also, about 60% of the energy is used by carnivores during respiration. Hence, respiratory loss from carnivores to decomposer is 60%. 

Thus, the correct answer is '20%, 30%, 60%'.

Multiple choice evs deficiency diseases need for nutrients nutrients needed by the body balanced diet and malnutrition food for health nutrition and its deficiency nutrition and its need

Organisms, obtain energy from sunlight and make organic matter from inorganic substance, known as _____________________.

  1. Heterotrophs

  2. Autotrophs

  3. Consumers

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

Autotrophs are organisms that produce their own food using sunlight (photosynthesis) or chemical energy, converting inorganic substances into organic matter.

Multiple choice botany plant breeding plant breeding for disease resistance and insect resistance method of plant breeding for crop improvement plant breeding for food production

Cattle feed should contain 

  1. roughage

  2. concentrate

  3. both of these

  4. none of these.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cattle diet varies from one period to another period. Generally the diet of cattle includes 15-10% of roughage and rest of them includes concentrate and other materials.

Multiple choice botany why classification? modern classification system traditional method of animal classification salient features of five kingdoms classification hierarchy hierarchy of classification

Algae, green plants and photosynthetic bacteria are:

  1. Autotrophic organisms

  2. Heterotrophic

  3. Decomposers

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

Autotrophic organisms are those that can produce their own food using light (photosynthesis) or chemical energy.

Multiple choice zoology excretion in living organisms excretion - animals human excretory system and products excretory system and products excretion - plants excretion in plants

The first formed nitrogenous waste of vertebrates is

  1. $NH _2$

  2. Urea
  3. $NH _3$
  4. $NH _4$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

For terrestrial vertebrates, nitrogenous wastes are removed from body fluids by the action of the kidneys, the same organ involved in maintaining water balance. Ammonia the direct waste produced as a byproduct of protein metabolism.  Produced by all animals.  Because of its toxicity, many animals convert ammonia into a less toxic form.  Any conversion of ammonia into other forms comes at a price, for animals must expend cellular energy (ATP) to convert ammonia to either form of nitrogenous waste listed below.


So, the correct option is 'Ammonia'.

Multiple choice botany micro - organism fungi: benefits and harmful effects useful and harmful fungi uses of fungi

The importance of fungi in food web lies in the fact that

  1. They are photoautotrophs.

  2. They have prokaryotic cell structure.

  3. They serve as key decomposers of dead organic matter.

  4. They generate antibiotics that kill competing plants and animals.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Fungus are an important part of the saprophytic food chain.
  • They decompose the organic waste left by other animals and convert it into inorganic components that can be again absorbed by the plants ie the organisms of the first trophic level of the food chain and enter the food chain again.
  • So, the correct answer is 'They serve as key decomposers of dead organic matter'.
Multiple choice biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

A secondary compounds is not a part of the plants

  1. Defense against herbivores

  2. Normal metabolism

  3. Evolution

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

Secondary compounds are complex chemicals made by plants that are not essential to the life of the plant. They are thought to be produced primarily as pesticides and anti-grazing agents, but they also used as pigments, hormones and chemical agents that can attack other plants.

So, the correct option is 'Defense against herbivores'.