Page 114 - Biology - XII

Conclusion
1. Maximum weight of gram seed was _____________ g after imbibing _____________ % NaCl solution

and _____________ g after imbibing _____________ % of sucrose solution.

2. _______________________________________ (Write for other seeds).

3. The percentage of imbibition in gram seeds = _________ % for NaCl, ________ % for sucrose solution.

(Write the percentage of imbibition for other seeds also.)

Precautions
1. Take the weights properly.
2. Do not confuse with your results.

VIVA VOCE

Q1. Why do the seeds swell when kept in water for few hours?
Ans. The dry seeds kept in water swell because of inward movement of water and swelling of substances
in the cells.

Q2. How do the seeds absorb water and swell when kept in water for few hours?
Ans. By the process of diff usion/osmosis.

Q3. Which seeds absorb maximum water/gained maximum weight in your experiment?

Ans. ___________________ seeds
Q4. Do all types of seeds absorb same/equal amount of water?
Ans. No

Q5. What is imbibition?
Ans. The taking up of water and consequently swelling of substances is called imbibition.

COMPETENCY BASED QUESTIONS

Multiple Choice Questions

Q1. The diff erence between imbibition and osmosis is
(a) imbibition takes place in living and non-living, but osmosis does not

(b) imbibition needs water, osmosis does not
(c) imbibition does not need semi-permeable membrane, osmosis needs it
(d) both need semi-permeable membrane

Q2. During imbibition process
(a) heat is absorbed from the surroundings (b) heat is always released to the surroundings
(c) heat is not released at all (d) I do not know.

113