Plants: Preparing and Storing Food - Class 4 - Science
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HOTS Questions - Plants: Preparing and Storing Food | Living Science | Science | Class 4
The leaves of a plant kept in the dark do not produce starch. Why?
The leaves of a plant kept in the dark do not produce starch because, for photosynthesis to occur, plants need sunlight. Photosynthesis is the process through which plants use sunlight to convert carbon dioxide from the air and water from the soil into glucose and oxygen. Glucose, a type of sugar, is then used by the plant for energy and growth, and it can be stored as starch in various parts of the plant.
In the absence of sunlight, the photosynthesis process cannot take place, and without photosynthesis, plants cannot produce glucose. Consequently, no glucose means there is no sugar available to be converted into starch, leading to the absence of starch production in the leaves of a plant kept in the dark.
A yellow leaf cannot prepare food. Why?
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Sign up nowQuestions & Answers - Plants: Preparing and Storing Food | Living Science | Science | Class 4
Tick ✅ the correct answer.
The main vein of a leaf carries
a. chlorophyll.
b. oxygen.
c. food.
The main vein of a leaf carries c. food. The main vein and the network of veins in a leaf are part of the plant's vascular system, which transports water, minerals, and nutrients (including food) throughout the plant. Chlorophyll is found within the cells of the leaf, mainly in the chloroplasts, not transported by veins. Oxygen is a by-product of photosynthesis and is also exchanged through the stomata in leaves, not carried by veins.
Tick ✅ the correct answer.
Air enters a plant through the stomata on its
a. leaves.
b. flowers.
c. stem.
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Sign up nowName the part of a cactus plant that prepares food for the plant.
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