Q. 15.0( 5 Votes )
The opening and closing of the stomatal pore depends upon:
C. water in guard cells
D. concentration of CO2 in stomata
The accumulation and loss of K+ ions cause the opening and closing of stomata. During day time, K+ ions are accumulated by the guard cells which increases the solute concentration and decreases the water potential. Thus, water enters the cell by endosmosis, cells become turgid and the stomatal pore open. During night time, guard cells lose the K+ ions which decreases the solute concentration and increases the water potential. Thus, water leaves the cell by exosmosis, cells lose turgidity and the stomatal pore close.
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Leaves of a healthy potted plant were coated with Vaseline to block the stomata. Will this plant remain healthy for long? State three reasons for your answer.
i. Why do fishes die when taken out of water?
ii. Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms?Xam idea - Science
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(a) Which organism is (i) omnivore
(ii) herbivore, and (iii) carnivore ?
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(c) Which organism is/are heterotroph(s)?
(d) Which organism can be a producer ?
(e) Which organism is/are consumer (s)?
(f) Give one example each of organisms which could be like (i) A (ii) B (iii) C, and (iv) DLakhmir Singh & Manjit Kaur- Biology
Which of the following is an incorrect statement?Evergreen Science
The opening and closing of the stomatal pore depends upon:Evergreen Science
While doing the experiment to show light is necessary for photosynthesis; the student was given following suggestions by his fellow students. Which are the correct suggestions given by his fellow students?
i) Safranin should be used instead of iodine.
ii) The leaf should be boiled in alcohol with water bath to remove chlorophyll.
iii) Transparent paper strip should be used instead of black paper strip.
iv) The plant should be destarched before starting the experiment.Xam idea - Science