Class 7 Exam > Class 7 Questions > Which of the following statements is false?a)...
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Which of the following statements is false?
- a)In cold regions plants grow new leaves during winter.
- b)Some desert plants do not have leaves.
- c)Thick skin protects the animals from the blazing heat of the sun.
- d)Bears have thick fur as a protection against the cold.
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Which of the following statements is false?a)In cold regions plants gr...
False Statement: In cold regions plants grow new leaves during winter.
Explanation:
In cold regions, plants do not grow new leaves during winter. This statement is false. Let's understand why:
1. Adaptations of plants in cold regions:
Plants in cold regions have to survive harsh winter conditions, including freezing temperatures, reduced sunlight, and limited water availability. To adapt to these conditions, plants have developed various strategies:
- Deciduous plants: Many plants in cold regions are deciduous, which means they shed their leaves during winter. This helps them conserve energy and reduce water loss, as leaves are responsible for transpiration (water loss through stomata).
- Evergreen plants: Some plants in cold regions are evergreen, meaning they retain their leaves throughout the year. However, these plants do not grow new leaves during winter. Instead, they have specialized adaptations to withstand the cold. For example, coniferous trees have needle-like leaves that reduce surface area and water loss.
- Winter dormancy: During winter, plants enter a state of dormancy where their metabolic activities slow down. They conserve energy and resources by not growing new leaves or actively carrying out photosynthesis.
2. Winter survival strategies:
Plants in cold regions have evolved various strategies to survive the winter:
- Buds: Plants produce buds during the growing season, which protect the delicate growing points from winter cold. These buds contain all the necessary structures for new leaf growth once the weather becomes favorable in spring.
- Antifreeze proteins: Some plants produce antifreeze proteins that prevent ice formation inside their cells. This helps them avoid damage from freezing temperatures.
- Insulating snow: Snow acts as an insulating layer for plants, protecting them from extreme cold. It helps maintain a more stable temperature around the plant's roots.
Conclusion:
In conclusion, plants in cold regions do not grow new leaves during winter. Instead, they have adapted various strategies such as shedding leaves, winter dormancy, and producing protective buds to survive the harsh winter conditions. Therefore, option A is the false statement.
Explanation:
In cold regions, plants do not grow new leaves during winter. This statement is false. Let's understand why:
1. Adaptations of plants in cold regions:
Plants in cold regions have to survive harsh winter conditions, including freezing temperatures, reduced sunlight, and limited water availability. To adapt to these conditions, plants have developed various strategies:
- Deciduous plants: Many plants in cold regions are deciduous, which means they shed their leaves during winter. This helps them conserve energy and reduce water loss, as leaves are responsible for transpiration (water loss through stomata).
- Evergreen plants: Some plants in cold regions are evergreen, meaning they retain their leaves throughout the year. However, these plants do not grow new leaves during winter. Instead, they have specialized adaptations to withstand the cold. For example, coniferous trees have needle-like leaves that reduce surface area and water loss.
- Winter dormancy: During winter, plants enter a state of dormancy where their metabolic activities slow down. They conserve energy and resources by not growing new leaves or actively carrying out photosynthesis.
2. Winter survival strategies:
Plants in cold regions have evolved various strategies to survive the winter:
- Buds: Plants produce buds during the growing season, which protect the delicate growing points from winter cold. These buds contain all the necessary structures for new leaf growth once the weather becomes favorable in spring.
- Antifreeze proteins: Some plants produce antifreeze proteins that prevent ice formation inside their cells. This helps them avoid damage from freezing temperatures.
- Insulating snow: Snow acts as an insulating layer for plants, protecting them from extreme cold. It helps maintain a more stable temperature around the plant's roots.
Conclusion:
In conclusion, plants in cold regions do not grow new leaves during winter. Instead, they have adapted various strategies such as shedding leaves, winter dormancy, and producing protective buds to survive the harsh winter conditions. Therefore, option A is the false statement.
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Which of the following statements is false?a)In cold regions plants grow new leaves during winter.b)Some desert plants do not have leaves.c)Thick skin protects the animals from the blazing heat of the sun.d)Bears have thick fur as a protection against the cold.Correct answer is option 'A'. Can you explain this answer?
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