5th Grade > Science
PLANTS MCQs
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A
The tea plant is an example of a plantation crop. It has green and thick leaves. It is found in hilly areas and requires moisture to grow. It is of course used to produce tea, a very common beverage.
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B
Root is a part of a plant found mostly under the soil. It absorbs water and minerals from the soil. It helps store nutrients. Oxygen and food are also transported from leaves to different parts of the plant.
Pollen is not transferred within the plant. Pollen is transferred externally from the anther to the stigma in flowers.
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A
Based on climatic conditions, crops are divided into kharif and rabi crops.
∙ Kharif crops: The kharif crops need hot weather and large amounts of rainfall to grow. These are sown with onset of monsoon in June and harvested around the month of October.
∙ Examples of kharif crops include jowar, rice, soyabean, paddy, maize, cotton, etc.
∙ Rabi crops: While some crops are sown in winter season from november to april. These are not affected by rainfall patterns. They require warm temperature to germinate and cold weather to grow.
∙ Example of rabi crops include wheat, gram, peas, mustard, etc.
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C
Plants, like cactus, that grow in deserts have modified leaves. Their leaves get modified to spines to reduce water loss. This helps the plant to conserve water and withstand very dry conditions.
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B
The growth of a seed into a young plant or a seedling is called germination. A seed requires proper moisture, air, temperature, and light for germination.
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A
Chlorophyll is a pigment that imparts green colour to the leaves. Plants require chlorophyll along with sunlight to prepare food.
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A
Cactus is a desert plant that has spines (modified leaves) to help reduce water loss and a thick fleshy stem to store water. These modifications help them to withstand the extremely dry conditions in deserts.
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C
The outer covering of a seed is called seed coat. The seed coat protects the baby plant residing inside the seed. The swollen part of the seed called cotyledon stores food and all the other essential nutrients required for the baby plant.
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D
∙ The main function of stem is to provide support to the plant. They transport water, food and nutrients to different parts of the plant.
∙ Roots carry out the function of absorbing water and minerals from the soil.