Question

3.[Fill in the blanks to complete the
explanation].
After the harvest, the soil becomes
deficient in ___________. Though, air is a
rich source of gaseous form of __________,
plants cannot utilize this form. The
_________ bacteria can take atmospheric
nitrogen and convert it into a soluble form
that the plants can absorb. But _________
bacteria can’t make its own food. It
therefore lives in the root of leguminous
plants where it gets food and __________.
In turn, it provides them with
___________. It thus has a _________
relationship with leguminous plants.
Association of two different organisms in
which both are ___________ is known as
___________.

Answer 1

Answer:

AM-CLAS...

21- Boojho took an empty 1 point

plastic bottle, turned it upside

down and dipped its open

mouth into a bucket filled with

water. He then tilted the bottle

slightly and made the following

observations (i) Bubbles of air

came out from the bottle (ii)

Some water entered the bottle

(iii) Nitrogen gas came out in

the form of bubbles and

Oxygen got dissolved in water

(iv) No bubbles formed, only

water entered the bottle. Which

observation is / are correct? *

(i) and (ii)

O

(iv)

O (iii) and (iv)

O (i) only