Download App

Plant Kingdom — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYPlant Kingdom2 Marks
Question
Which pteridophytes are useful in nitrogen-fixation and how?
✓

Answer

Azolla is a water fern, having a symbiotic association with nitrogen-fixing cyanobacterium Anabaena. It is introduced into paddy fields to function as biofertiliser.

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 "2 Marks Questions" from Plant Kingdom→Plant Kingdom — all question types→BIOLOGY STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

What is meant by amphibians? Write the names of any four amphibians.
→
If one wants to find minerals in the form they are mobilised in the plant, how will the analysis of the exudate help?
→
In a class, teacher taught about the significance of water intake during summers. Teacher told children that water intake is valuable for healthy living and for proper digestion and excretion. Drinking enough water directly or through food helps the kidneys in their proper working.
  1. What is osmoregulation?
  2. Why we generally urinate fewer times in summer than in winter and the urine passed is usually thicker. Give the reason behind this statement.
→
The thyroid gland is also called the "nature gland." Why?
→
Mention any four activities regulated by the estrogen hormone.
→
What are macromolecules? Give examples.
→
Explain single circulation using a diagram.
→
Respiration requires $O _2$. How did the first cells on the earth manage to survive in an atmosphere that lacked $O _2$?
→
  1. Why are symptoms of nitrogen deficiency related to molybdenum deficiency?
  2. Mention two symptoms of nitrogen deficiency in plants.
→
How does metaphase I differ from metaphase?
→