PLANT-WATER RELATIONS

Question 1

Water is essential for all…

Answer 1

Physiological activities

Question 2

Water provides the medium in
which most substances are …

Answer 2

Dissolved

Question 3

The protoplasm of cells is
nothing but water in which different molecules are …and..

Answer 3

dissolved and (several
particles) suspended.

Question 4

Water percentage in..
1.watermelon
2.Most herbaceous plants

Answer 4

1.over 92 percent
2.only 10 to 15 percent of its fresh weight as dry matter

Question 5

Water distribution in plants varies as-
Woody parts and soft parts

Answer 5

woody parts :-relatively very little water
soft parts :-mostly contain water.

Question 6

seed may appear dry but …

Answer 6

it still has water – otherwise it would
not be alive and respiring!

Question 7

If seed do not have water it would be ….

Answer 7

Not alive and respiring

Question 8

Terrestrial plants take up huge amount water daily but most of it is lost to the air through evaporation from the leaves, i.e., …

Answer 8

Transpiration

Question 9

Absorption of water in
mature corn plant ..
mustard plant ..

Answer 9

mature corn plant:-almost three litres of water in a day
mustard plant :- water equal to its own weight in about 5 hours.

Question 10

mustard plant absorbs water equal to its own weight in … hours.

Answer 10

5 hrs

Question 11

Because of this high demand for water, it is not surprising that water is often the limiting factor for …

Answer 11

plant growth and productivity in both
agricultural and natural environments.

Question 12

water is
often the limiting factor for plant growth and productivity in both
..nd..

Answer 12

agricultural and natural environments.

Question 13

Water potential