Question

Take
three
test-tubes.
Fill
3/4th
of
each
with
water.


Label
them
A,
B
and
C.
Keep
a
snail
in
test-tube
A,
a


water
plant
in
test-tube
B
and
in
C,
keep
snail
and

plant
both.
Which
test-tube
would
have
the
highest


concentration
of
CO2?​

Answer 1

Answer:

The test tubes B contains a water plant. This plant takes carbon dioxide for photosynthesis and gives out oxygen. Thus, the concentration of oxygen will be more in test tube B. In test-tube C, both the water plant and the snail is kept.

Answer 2

Answer:

The answer is Test Tube A.

Explanation

1] In the test-tube A there there is only a snail and in respiration the snail will give out carbon dioxide.

2] In the test-tube B there is only a plant which and in respiration the plant will give out carbon dioxide which is used by the plant itself in photosynthesis. So, there's air is balanced.

3] In the test-tube C there is a snail and a plant. The carbon dioxide produced by the snail and plant is used by the plant it self. So, the condition in this test-tube is similar to test-tube B.

So, The answer is Test-Tube A.