Start learning →

NEET UG Ecosystem — practice questions — page 2

Explore 105 free Ecosystem questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

Practise Ecosystem with Quill →

Ecosystem questions and exercises with answers

Showing questions 31–60 of 105.

Which unit is used to compare the productivity of different ecosystems?Read the answer and worked solution →A grassland has GPP of 1000 kcal per square metre per year and loses 400 in respiration. What is its NPP?Read the answer and worked solution →Which biomass is left for heterotrophs to consume?Read the answer and worked solution →Secondary productivity is the rate of formation of new organic matter by:Read the answer and worked solution →Oceans cover about 70 percent of Earth's surface. Roughly how much annual NPP do they yield?Read the answer and worked solution →Why is the earthworm called the farmer's friend?Read the answer and worked solution →Dead leaves, bark, dead animals and fecal matter that serve as raw material for decomposition are called:Read the answer and worked solution →Breaking detritus into smaller particles by detritivores such as earthworms is called:Read the answer and worked solution →Water-soluble nutrients moving down the soil and settling as unavailable salts is called:Read the answer and worked solution →Degradation of detritus into simpler inorganic substances by bacterial and fungal enzymes is called:Read the answer and worked solution →The dark coloured amorphous substance that builds up during humification is:Read the answer and worked solution →Which property correctly describes humus?Read the answer and worked solution →Humus acts as a reservoir of nutrients because it is:Read the answer and worked solution →Release of inorganic nutrients when microbes further degrade humus is called:Read the answer and worked solution →Decomposition in soil is largely what kind of process?Read the answer and worked solution →Under the same climate, detritus decomposes fastest when it is rich in:Read the answer and worked solution →Which climatic factors most regulate decomposition?Read the answer and worked solution →Which conditions inhibit decomposition and let organic matter build up?Read the answer and worked solution →Which ecosystem does not depend on the sun as its energy source?Read the answer and worked solution →Ecosystems need constant energy to resist disorder, per the:Read the answer and worked solution →Who are the major producers in a terrestrial ecosystem?Read the answer and worked solution →The death of an organism marks the beginning of which food chain?Read the answer and worked solution →Animals that feed directly on producers are called:Read the answer and worked solution →Which of these are common herbivores in aquatic ecosystems?Read the answer and worked solution →A carnivore that feeds on herbivores is a primary carnivore and also a:Read the answer and worked solution →In the grazing food chain grass to goat to man, the man is a:Read the answer and worked solution →Decomposers that feed by degrading dead organic matter are also known as:Read the answer and worked solution →How do decomposers obtain nutrients from dead matter?Read the answer and worked solution →In a terrestrial ecosystem, the larger fraction of energy flows through the:Read the answer and worked solution →Which pair of animals are omnivores in a natural ecosystem?Read the answer and worked solution →

Worked practice questions

Which unit is used to compare the productivity of different ecosystems?

  1. Individuals per square metre
  2. Grams per square metre only
  3. Kilocalories per gram of tissue
  4. Grams per square metre per year
Show answer and solution

Correct answer: D. Grams per square metre per year

Productivity is a rate, so it is expressed as mass per unit area per unit time, such as g per square metre per year.

Open this question →

A grassland has GPP of 1000 kcal per square metre per year and loses 400 in respiration. What is its NPP?

  1. 1400
  2. 400
  3. 600
  4. 2.5
Show answer and solution

Correct answer: C. 600

NPP equals GPP minus respiration losses, so 1000 minus 400 gives 600 kcal per square metre per year.

Open this question →

Which biomass is left for heterotrophs to consume?

  1. Net primary productivity
  2. Photosynthetic radiation
  3. Gross primary productivity
  4. Secondary productivity
Show answer and solution

Correct answer: A. Net primary productivity

What remains after plants use part of GPP in respiration is NPP, and this is what herbivores and decomposers can use.

Open this question →

How to practise

  1. Choose a Ecosystem question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Ecosystem practice for NEET UG. Read explanations as you go. No signup form needed to start.

Practise Ecosystem →

More Biology topics

Genetics and EvolutionReproduction in Organisms & PlantsBiotechnology and ApplicationsBiodiversity and ConservationThe Living World & Biological ClassificationNeural Control and Chemical CoordinationPrinciples of Inheritance and VariationAnimal Kingdom