Three matured air dried bean seeds are taken and tied to a glass slide at three positions as shown. This slide is kept in a beaker containing water in a manner that the top seed is well above water, the middle one is just at the water level and the bottom one is deep in water. The experimental set up is left in a warm place for a few days. What will you notice by the end of the process?

Bottom and top seed will germinate and the middle one will not germinate.

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The middle seed will germinate, the top and the bottom seeds will not germinate.

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All the seeds will germinate.

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Top and middle seed will germinate and the one at the bottom will not germinate.

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Solution

The correct option is B
The middle seed will germinate, the top and the bottom seeds will not germinate.

Seed requires both right amount oxygen(air) as well as water to germinate. It will be noticed that the middle seed germinates, the seed at the top does not germinate while the bottom one either does not germinate or germinates very little. The middle seed germinates because it gets the right quantity of oxygen (air) as well as water. The top seed gets only air and no water while the bottom seed gets water but doesn't get air as it is submerged in water completely.

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Similar questions

Q. Which one of the following is the correct set of three precautions for setting up the experiment to demonstrate that carbon dioxide is evolved during respiration?
(1) Air tight set up; delivery tube dips in water in beaker; flask has seeds which have just germinated.
(2) Thread holding KOH test tube; air tight flask; delivery tube above surface of water in the beaker.
(3) Germinated seeds under water in the flask; experimental set up not air tight; delivery tube above water level.
(4) Delivery tube touching bottom of water; KOH test tube held by a thick wire; seeds covered by water.

Q. An experimental set-up to demonstrate respiration in germinating seeds is shown here. It is observed that water from the beaker has not risen into the delivery tube (bent tube). This is because :

(1) the set-up is airtight
(2) the beaker has coloured water
(3) carbon dioxide is not being absorbed
(4) no oxygen is available to seeds for respiration

Three matured air dried bean seeds are taken and tied to a glass slide at three positions as shown. This slide is kept in a beaker containing water in a manner that the top seed is well above water, the middle one is just at the water level and the bottom one is deep in water. The experimental set up is left in warm place for few day. What will you notice by this processes?

here r 4 containers and Dry cotton wool is placed at the bottom of each container each of them r same sizes:

(a) Soaked bean seeds are kept in the container A and a few drops of water are added daily to moisten the cotton - wool. what will u notice after few days?

(b) Soaked bean seeds r placed in container B but the cotton wool is not moistened. what u notice after few days?

(d) Soaked seeds r placed in container D water is added sufficiently to submerge the seeds .

in all d containers A<B<C<D an equal no. of seeds from the same lot r kept in the same conditions of light and temperature.

what conclusions would y draw from the results given above.

Q. When dried seeds are placed in water they absorb water and swell this because of

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