Download App

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

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 12. ecosystem1 Mark
MCQ
In which layer of soil decomposition occurs at maximum rate?
  • ✓
    Upper layer of soil
  • B
    Middle layer of soil
  • C
    Lower layer of soil
  • D
    None of these
✓

Answer

Correct option: A.
Upper layer of soil
a
Upper layer of soil. Decomposition is the process of breaking down a substance into its constituent parts. Decomposition of dead organic matter (plants, animals and waste products of animals) occurs in nature and it is also called decay or putrification. In a terrestrial ecosystem, the upper layer of soil is the main site of decomposition

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 (1 Marks)" from STD 12 - 12. ecosystem→STD 12 - 12. ecosystem — all question types→Biology STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Which of the following most often limits the primary productivity of the ecosystem?
→
Source of energy in an ecosystem is
→
The natural method of pest and pathogen control involving use of viruses, bacteria and other insects is called
→
In $1953 \ \text{S.L.}$ Miller created primitive earth conditions in the laboratory and gave experimental evidence for origin of first form of life from preexisting non$-$living organic molecules. The primitive earth conditions created include:
→
In $DNA$ if $10\%$ guanine is present, how much thymine is present
→
Branching descent and natural selection development are the concepts of which scientist?
→
Linkage decreases the frequency of
→
Bacteria protect themselves from viruses by fragmenting viral $\text{DNA}$ with:
→
If the mean and the median pertaining to a certain character of a population are of the same value, the following is most likely to occur:
→
The components of a bioreactor are

$I.$ an agitator system

$II.$ an oxygen delivery system

$III.$ foam control system

$IV.$ temperature control system

$V.$ $pH$ control system

$VI.$ sampling ports to with draw cultures periodically

Choose the correct option

→