Complete the following statements by choosing the correct alternative out of those given in the brackets :
Approximately 98 % of water is absorbed through __________________________ ( active absorption / passive absorption / plasmolysis ) .

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Solution

Roots absorb water from the soil through root hairs , maximum water quantity absorbed through passive absorption .
Passive absorption :
It occurs due to osmosis .
The driving force is provided by loss of water during transpiration .
Absorption of water without the utilization of metabolic energy .
Final answer :
Approximately 98 % of water absorbed through passive transport .

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The following paragraph is related to absorption of water from the soil. Complete the paragraph by selecting the correct word from those given below. You may use a term only once.

channel xylem opposite endodermis cortex surface area soil particles roots water

__________can enter plants through entire surface of plant body. However, the bulk of water is absorbed by land plants through the __________. Root hairs are in contact with__________. These provide a large __________ for water absorption. Absorbed water is transported to the__________ and endodermis. Internal to the__________ is a single layer of pericycle. The protoxylem elements of xylem lie in __________to the pericycle. This way a direct__________ is formed for the passage of water from the root hair cells to the __________.

Fill in the blanks by choosing the correct alternative from those given in brackets.

(a) When placed in a more concentrated solution, the cell contents will ............................. (shrink/ swell up)

(b) The pressure by which the ............................. molecules tend to cross the semi-permeable membrane is called osmotic pressure.(salt / water)

Complete the following statement by choosing the correct option out of those given within brackets.
Loss of water as droplets through the leaf margin of a plant is termed (bleeding/guttation/transpiration).

Approximately 98% of the water is absorbed by the plants through ____. (passive absorption, active absorption, plasmolysis)

The active absorption of water that does not require a direct supply of energy is known as ,

a) electro osmotic active absorption

b) osmotic active absorption

c) passive water absorption

d) non osmotic active absorption

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Complete the following statements by choosing the correct alternative out of those given in the brackets :Approximately 98 % of water is absorbed through __________________________ ( active absorption / passive absorption / plasmolysis ) .

Complete the following statements by choosing the correct alternative out of those given in the brackets :
Approximately 98 % of water is absorbed through __________________________ ( active absorption / passive absorption / plasmolysis ) .