Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

How are primary productivity and primary production expressed?
Asked by Gaurishrrivastava.28 | 25 Feb, 2019, 09:43: PM
answered-by-expert Expert Answer
  • Primary production is the production of chemical energy in organic compounds by living organisms. 
  • Primary productivity is the productivity of the primary producers of an ecosystem.
  • Gross primary productivity, or GPP, is the rate at which solar energy is captured in sugar molecules during photosynthesis, i.e., the energy captured per unit area per unit time.
  • Net primary productivity, or NPP, is gross primary productivity minus the rate of energy loss to metabolism and maintenance.
  • (NPP) = (GPP) - Respiration (R).
Answered by Sheetal Kolte | 26 Feb, 2019, 11:57: AM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 12-science - Biology
How are primary productivity and primary production expressed?
Asked by Gaurishrrivastava.28 | 25 Feb, 2019, 09:43: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
what are edhapic factors , topography, benthic zone
Asked by pardeepkumar2281 | 08 Feb, 2019, 08:42: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Which of the following is the most diverse in a food chain? producers or decomposers?
Asked by imtiyazmulla68 | 16 Apr, 2018, 06:44: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Detritivores help in the process of decompsition which is one of the components of the functional ecosystem. Explain what happens to the detritus during the process.
Asked by pksunilnair | 24 Mar, 2018, 04:58: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
All the primary productivity is not available to a herbivore. Give one reason. 
Asked by Topperlearning User | 13 Jun, 2014, 04:56: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Why is the rate of assimilation of energy at the herbivore level called secondary productivity? 
Asked by Topperlearning User | 19 Sep, 2016, 06:12: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
What are primary consumers?
Asked by Topperlearning User | 19 Sep, 2016, 06:13: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
(i) Define mineralisation. (ii) Justify the pitcher plant as a producer.
Asked by Topperlearning User | 19 Sep, 2016, 06:13: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Name the dominant producers in a deep aquatic ecosystem. What other name could you give to a primary consumer?
Asked by Topperlearning User | 13 Jun, 2014, 04:56: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
What does secondary productivity in an ecosystem indicate? List any two factors by which productivity is limited in an aquatic ecosystem. 
Asked by Topperlearning User | 13 Jun, 2014, 04:56: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×