Download App

STD 12 - 8. microbes in human welfare — Biology STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 8. microbes in human welfare1 Mark
MCQ
Azolla is used as a biofertiliser because it
  • A
    Has association of mycorrhiza
  • B
    Multiplies at faster rate to produce massive biomass
  • C
    Has association of nitrogen-fixing Rhizobium
  • ✓
    Has association of nitrogen-fixing cyanobacteria
✓

Answer

Correct option: D.
Has association of nitrogen-fixing cyanobacteria
d
Azolla is a pteridophyte and it is used as a biofertiliser because it has association with nitrogen-fixing cyanobacteria called Anabaena azollae.

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 - 8. microbes in human welfare→STD 12 - 8. microbes in human welfare — all question types→Biology STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Complementary $DNA\ (cDNA)$ is complementary to
→
On the global basis the maximum productivity is shown by
→
The most important component of the oral contraceptive pills is
→
$\mathrm{Hb}^{\mathrm{A}}$ and $\mathrm{Hb}^{\mathrm{S}}$ alleles of normal and sickle celled $\text{RBC}$ are
→
The transforming principle of Pneumococcus as found out by Avery, MacLeod and $\text{Mc}$ Carty was:
→
Principle to lower the risk of getting sexually transmitted disease is:
→
If $X$ chromosome contained sperm entered in $X$ chromosome contained ovum than ...... is produced
→
Which of the following statements, support the view that elaborate sexual reproductive process appeared much later in the organic evolution.
  1. Lower groups of organisms have simpler body design.
  2. Asexual reproduction is common in lower groups.
  3. Asexual reproduction is common in higher groups of organisms.
  4. The high incidence of sexual reproduction in angiosperms and vertebrates.
Choose the correct answer from the options given below.
→
Choose the correct statement regarding the $\text{ZIFT}$ procedure.
→
Minerals and metals are:
→