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 origin of universe universe and organic evolution biology

Which of the following components of the environment includes the plants?

  1. Producer

  2. Decomposer

  3. Consumer

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

Plants are autotrophs that produce their own food through photosynthesis, making them the primary producers in an ecosystem.

Multiple choice social studies environment in its totality alternatives for minimising depletion of natural resources components of environment effects and successes of environment conservation environmental risks of economic development tundra climatic region

The relationship between ______ and aerobic cellular respiration should be kept in mind when discussing the carbon cycle.

  1. pollution

  2. trophic levels

  3. photosynthesis

  4. food webs

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

Photosynthesis and aerobic cellular respiration are complementary processes in the carbon cycle, where one consumes carbon dioxide and produces oxygen, while the other does the reverse.

Multiple choice biology biology : an introduction introduction to organization of life signs of life what is living?

Choose the correct answers from the alternatives given .
Which of the following is characteristics of living organisms?

  1. To be organised

  2. To respond

  3. To metabolise

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Living organisms show certain characteristics that make them different from non-living. 
  • Cellular organization - Each living organism has cells as a basic unit of life. Different organelles are organized to function as a unit inside the cell.
  • Ability to response - a living organism can sense and respond accordingly to external environmental conditions or stimuli. 
  • Metabolism - Different types of chemical reactions occur inside living organisms to maintain their living state. 
All of the given options are characteristics of living organisms. 
So the correct answer is "All of these".
Multiple choice chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

Non-degradable and fat-soluble pollutant, such as DDT enters the food chain, the pollutant:

  1. magnifies in concentration at each trophic level

  2. degrades at first trophic level

  3. accumulates in the body fat of organism at the first trophic level and does not pass to second trophic level

  4. decreases in concentration at each trophic level
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Biomagnification is the accumulation or increasing concentration of lipophilic pesticides in the top members of the food chain. 
During biomagnification, the concentration of non-degradable pesticide like DDT goes on increasing along the food chain and highest values occur in the consumers of the top trophic level. So, the value of pesticide will go on increasing at each trophic level. 

Thus, the correct answer is option A.
Multiple choice chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

Full form of GFC is?

  1. Grazing food chain

  2. Grazing fish chain

  3. Gross food chain

  4. Green forest conservation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

GFC means "Grazing Food Chain".

A grazing food chain is a food chain in which the energy in the lowest trophic level is derived from photosynthesis.


 GFC is the major source of energy flow in the terrestrial ecosystem.

Multiple choice evs sources of food food of animals animal and their eating habit classification of animals on the basis of food

The most energy-efficient method to feed large human populations such as in China is to eat:

  1. mostly rice and vegetables with little meat

  2. large amounts of meat with few vegetables

  3. large amounts of fish with little rice

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

Inorder to feed a largely populated country like China, the food resources should be easily cultivated and nutritionally rich. 

Rearing large amount of meat requires large amount of fodder accordinh to the liendmans 10% percent energy law.
Rice can be easily cultivated and is rich is carbohydrates and can be genitically manipulated to increase nutritional value like vitamin A.
So, the correct option is 'mostly rice and vegetables with little meat'.

Multiple choice evs seeds and seeds plant adaptation and modification leaves leaf modification

Which of the following is insectivorous?

  1. Hydrilla

  2. Ricinus

  3. Drosera

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

Drosera, also called as sundew is an insectivorous plant because it lives by feeding on insects. its leaves are covered by a mucilaginous substance which attracts the insect and traps it. It looks like morning dew, so the name sundew.

Thus, the correct answer is 'Drosera'.

Multiple choice evs seeds and seeds plant adaptation and modification leaves leaf modification

Insectivorous plants are also called as

  1. Omnivorous plants

  2. Carnivorous plants

  3. Parasitic plants

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

Insectivorous plants are often called carnivorous plants because they usually trap and digest the insects to obtain their required nutrients.  

So the correct option is ' Carnivorous plants'

Multiple choice evs seeds and seeds plant adaptation and modification leaves leaf modification

Insectivorous plants are _________.

  1. Saprophytes

  2. Heterotrophs

  3. Semiautotrophs

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

Autotrophs plants are those which gets nutrients through photosynthesis in the presence of sunlight. Insectivorous plants just like almost every other plant, get their energy from sunlight. They feed on insect to fufill their nitrogen requirement, that's why they can easily grown in nitrogen deficient soil condition.

Multiple choice evs seeds and seeds plant adaptation and modification leaves leaf modification

Which is not an insectivorous plant?

  1. Dionaea
  2. Dischidia$/$Monotropa

  3. Drosera

  4. Pinguicula
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
$\to$ Dischidia / Monotropa. 
$\to$ Monotropa is a genus of 5 species of herbaceous perennial flowering plants, formly classified in the family Monotropaceae, but now included with most the Ericaceae. 
$\bullet$ unlike most of the plants, they do not contain chlorophyll.
$\bullet$ They are myco - heterotrophs, getting their food through parasitism upon fungi rather than synthesis.
$\bullet$ Thus, they are capable of living in very dark conditions.
Multiple choice biology the leaf mechanism of absorption mineral absorption significance of transpiration

What would happen if green plants disappear from earth?

  1. Only herbivores die

  2. Only carnivores die

  3. No one dies

  4. Both herbivores and carnivores die
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Green plants are the sources of food and energy for all organisms. If all green plants disappear from the earth, all the herbivores will die due to the absence of food and so will the carnivores.

So, the correct answer is option D.

Multiple choice zoology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

Which of the following is the major source of phosphorus?

  1. Plants

  2. Animals

  3. Crystalline rocks

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

Phosphorus is a critical element. In living systems, it occurs in nucleic acids, nucleotides including ATP, bones, teeth, phospholipids etc. It is obtained from the soil as orthophosphates. Organic phosphorous circulates in nature from plants to animals. Phosphate is released by decomposers back to the soil. The reservoir pool for phosphorus is phosphates in rocks from which the phosphorus is slowly transferred to cycling pool.

Multiple choice biology butterfly and honey bee life cycle of a butterfly metamorphosis in frogs the life of a butterfly types of reproduction in animals oviparous and viviparous

What is the main food of young tadpoles?

  1. Other tadpoles

  2. Algae and other plant material

  3. mall aquatic invertebrates

  4. Leftovers thrown by man
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A tadpole (also called a pollywog) is the larval stage in the life cycle of an amphibian, particularly that of a frog or toad. They are usually wholly aquatic, though some species have tadpoles that are terrestrial. When first hatched from the egg they have a more or less globular body, a laterally compressed tail and internal or external gills. As they grow they undergo metamorphosis, during which process they grow limbs, develop lungs and reabsorb the tail. Most tadpoles are herbivorous. 

So the correct option is 'algae and other plant material'.