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
___________.
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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
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