Q7 of 86 Page 150

During photosynthesis plants exhale ________.

Oxygen is given as a by-product from the plants by photosynthesis process. They take in carbon dioxide and release oxygen during preparation of glucose by the cells containing chlorophyll mainly in leaves.

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The non-directional movement of a plant part in response to temperature is called ________.

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Dandelion flowers open the petals in bright light during the day time but close the petals in dark at night. This response of Dandelion flowers is called ___________.

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Chlorophyll in a leaf is required for __________.

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A plant is kept in a dark room for about 24 hours before conducting any experiment on photosynthesis in order to _______.