Download App

STD 12 - 12. ecosystem — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 12. ecosystem1 Mark
MCQ
Secondary productivity is
  • ✓
    The rate of formation of new organic matter by consumers
  • B
    Greater than primary productivity
  • C
    $5 \;\%$ less than primary productivity
  • D
    Equal to the gross primary productivity
✓

Answer

Correct option: A.
The rate of formation of new organic matter by consumers
a
The rate of formation of new organic matter by consumers is called secondary productivity

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q [1M]" from STD 12 - 12. ecosystem→STD 12 - 12. ecosystem — all question types→BIOLOGY STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

To grow microbes on a commercial scale, a large vessel is required, which is known as:
→
Transcription is a process by which
→
Hardy - Weinberg equilibrium is affected by :
→
Condoms are made up of thin rubber/latex sheath which is used to cover
→
Gestation period is the duration
→
Which traits were mainly described in study of Mendel:
→
Which of the following statement is not true?

$I.$ DNA being a hydrophilic molecule cannot pass through cell membranes

$II.$ Agrobacteriumtumefaciens delivers a piece of $DNA$ known as $'Z-DNA'$ in the Tiplasmid which transforms normal plant cells into tumour cells to produce chemical against pathogens

$III.$ Retrovirus, adenovirus, papillomavirus are also now used as cloning vectors in animal because of their ability to transform normal cells into cancerous cell.

$IV.$ In genetic engineering, $DNA$ from different sources are cut with the same restriction enzymes so that both $DNA$ fragments have same kind of sticky ends

Choose the correct option

→
Small proteins produced by vertebrate cells naturally in response to viral infections and which inhibit multiplication of viruses are called:
→
Which cells come earliest in the sequence of sperm production?
→
The crops engineered for glyphosate are resistant/tolerant to
→