Give reasons/explain :
(a) It is necessary to place a plant in the dark before
starting an experiment on photosynthesis.
(b) It is not possible to demonstrate respiration in a green
plant kept in sunlight.
(c) Most leaves have the upper surface more green and
shiny than the lower surface.
(d) During the starch test the leaf is
(1) boiled in water.
(2) boiled in methylated spirit.
Answers
Answer:
Answer
(a) - it is necessary to place the plant in a dark room for the experiment of photosynthesis because as we all know that photosynthesis take place in the presence of Sunlight so if you want to test the process of photosynthesis for any experiment related to photosynthesis then it is necessary to place the plant in a dark room where the sunlight cannot reach
(b) - yes it is not possible to to demonstrate respiration in green plants kept in sunlight because if they are in sunlight then they will do their all process in the presence of Sunlight and we cannot find any difference between them if they are in sunlight
(c) - more sleep have their upper surface more green than the lower surface because they are much closer to the rays of Sun light it and the lower surface are not as much closer as to the upper surface that is why the upper surface is more Shiny and Greeny than the lower surface
(d) - if we want to test the starch in the leaf then we should boil it in a water because if we boil it then they will lose all their colour and green pigment and turn their colour into black and in this way we can easily find out or perform the reaction of the experiment of starch
hope this will help you dear
Answer:
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