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Plants store food in the form of starch.True (T)The midrib attaches the leaf blade to the stem.False (F). (The petiole attaches the leaf blade to the stem.)Leaves release carbon dioxide during photosynthesis.False (F). (Leaves take in carbon dioxide and release oxygen.)Leaves can make food in the absence of sunlight.False (F).Flax is a plant fibre.True (T)
.................................... has taproot.a. MangoThe ................................ of cactus makes food for the plant.b. stem................................ traps the sun's energy during photosynthesis.d. ChlorophyllIodine solution can be used to prove the presence of ......................................c. starchPlants release water vapour during the process of ................................b. transpiration
What are called the 'food factories' of the plant?LeavesName a dye obtained from plants.Indigo or hennaName a plant whose roots can be eaten.Carrot or beetroot or radishIn what natural cycle does transpiration play an important role?Water cycleWhat medicine do we get from the Cinchona tree?Quinine
What parts of the plant does the shoot support?The shoot supports the stem, branches, leaves, flowers, and fruits.What is a storage root?A storage root is a root that stores food in the form of starch, like carrots and beetroots.What are the three things without which photosynthesis cannot take place?Sunlight, carbon dioxide, and water.How do stomata help in the exchange of gases?Stomata allow plants to take in carbon dioxide and release oxygen during photosynthesis.Define transpiration.Transpiration is the process by which plants release water vapor from their leaves.
What are the functions of the stem?The stem supports the branches, leaves, flowers, and fruits. It transports water and minerals from the roots and food from the leaves. Some stems store food, and some green stems make food for the plant.Define photosynthesis. How do plants make food?Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to make food. Plants use chlorophyll to trap sunlight energy. They take in water from the soil and carbon dioxide from the air and convert them into glucose and oxygen.Explain with the help of an activity that leaves contain starch.To prove leaves contain starch, you can perform an iodine test. Boil a leaf in alcohol to remove chlorophyll, then rinse it with water. Add iodine solution to the leaf. If the leaf turns blue-black, it indicates the presence of starch.How does transpiration take place?Transpiration occurs when plants release excess water vapor from their leaves through the stomata. This process helps to cool the plant and contributes to the water cycle.Describe the uses of the banana and coconut plants.Banana plants: Raw bananas are cooked and eaten, ripe bananas are eaten as fruit, banana leaves are used as plates, and fibers from the stems are used for making useful things. Coconut plants: The coconut fruit is used in cooking, coir fiber is used to make ropes, coconut oil is used in cooking, and the leaves are used to make roofs.
Answer to text book exercise
SECTION 1
I. Write true (T) or false (F).
II. Tick (✔) the correct option to complete each sentence.
III. Answer in a word or two.
SECTION 2
I. Short answer questions
II. Long answer questions
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