Download App

Environmental Issues — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYEnvironmental Issues1 Mark
MCQ
Increase in the percentage of fauna and decrease in flora may be dangerous because it enhances:
  • A
    Percentage of $\mathrm{CO}_2$
  • B
    Percentage of radioactive fallout
  • C
    Percentage of $\mathrm{O}_2$
  • ✓
    Percentage of diseases
✓

Answer

Correct option: D.
Percentage of diseases

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 Environmental Issues→Environmental Issues — all question types→BIOLOGY STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Kanha Biosphere Reserve is established in:
→
In double fertilization, after entering ..... of the synergids, the pollen tube releases ..... male gametes into the cytoplasm of the synergids
→
In the human female, menstruation can be deferred by the administration of
→
Which of the following is false for $BT $ transgenic plant
→
Environment is warmed up by:
→
$A$ : Taxonomic diversity represents the maximum level of species diversity.

$R$ : It represents species of taxonomically different groups occurring in equal balance.

→
Which among the following are called the Darwin’s finches?
→
Which of the following is responsible for transcription of $t-RNA$ and $snRNAs$
→
In testis, the immature germ cells produce sperm by $...A...$ at puberty $...B...$ present on the inside wall of seminiferous tubules multiply by$ ...C..$. division and increase their number. Identify $A$,$B$ and $C$ from the above statement
→
Who first conducted experiment on evolution to prove biochemical origin of life?
→