question_answer 22)

Which of the following is an example of imbibition? (a) Uptake of water by root hair                                (b) Exchange of gases in stomata (c) Swelling of seed when put in soil                        (d) Opening of stomata

Answer:

                  (c) Swelling of seed in soil is an example of imbibition. Imbibition is a type of diffusionprocess along the concentration gradient enabling the solid to absorb water andincrease in volume. When seed is put in the soil it absorbs water which activateenzymes present in seed and this induces the seed germination. The other options, i.e., uptake of water by root hair is an example of absorption,exchange in of gases stamata is an example of diffusion and opening of stomata is anexample of turgor pressure or turgidily.