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CBSE Class 7 Science Chapter 10 Life Processes in Plants Worksheet - Free Download
True/False
(i) The food synthesized by the plants is stored as starch.
(ii) Plants take carbon dioxide from the atmosphere mainly through their leaves.
(iii) Only green leaves can perform photosynthesis.
(iv) Starch turns blue-black when tested with iodine.
(v) Phloem carries water and minerals from the soil.
Fill in the Blanks
(i) In photosynthesis solar energy is captured by the pigment called ____.
(ii) During photosynthesis plants take in ____ and release ____ .
(iii) ____ in plant take in carbon dioxide from the air for photosynthesis.
(iv) ____ are the products of photosynthesis.
(v) Food made by leaves is transported by the __________.
(vi) During respiration, plants use __________ to break down glucose.
Answer the Following Questions
Q.1. From where do plants get raw materials to prepare their food?
Q.2. What is the ultimate source of energy for all living organisms?
Q.3. What are the other parts of plant where photosynthesis occurs except leaves?
Q.4. What are stomata?
Q.5. What is chlorophyll?
Q.6. What is plant respiration and how is it different from photosynthesis?
Q.7. Why do we boil the leaf in alcohol when we are testing it for starch?
Q.8. What is the role of leaves in food preparation? How is starch tested in a leaf?
Q.9. Describe how water and minerals are transported in plants.
Q.10. How do plants transport food to different parts of the body?
For Worksheet Solutions, go to Worksheet Solutions: Life Processes in Plants
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FAQs on CBSE Class 7 Science Chapter 10 Life Processes in Plants Worksheet - Free Download
| $1. What are the main life processes in plants? |  |
Ans. The main life processes in plants include photosynthesis, respiration, transpiration, and reproduction. Photosynthesis is the process by which plants convert light energy into chemical energy, primarily using sunlight, carbon dioxide, and water to produce glucose and oxygen. Respiration involves the breakdown of glucose to release energy for growth and maintenance. Transpiration is the process of water vapor loss from plant surfaces, mainly through stomata, which helps in nutrient uptake and temperature regulation. Reproduction can occur sexually through seeds or asexually through methods like budding and vegetative propagation.
| $2. How does photosynthesis benefit plants and the environment? | |
Ans. Photosynthesis benefits plants by providing them with the energy needed for growth and development. It converts carbon dioxide from the atmosphere and water from the soil into glucose, which serves as food for the plant. Additionally, photosynthesis releases oxygen as a byproduct, which is essential for the survival of most living organisms, including humans. This process also plays a critical role in reducing carbon dioxide levels in the atmosphere, thereby helping to combat climate change and improve air quality.
| $3. What is the role of transpiration in plants? | |
Ans. Transpiration plays a vital role in plants by regulating water temperature and maintaining nutrient flow from the roots to the leaves. As water evaporates from the stomata in the leaves, it creates a negative pressure that pulls water and minerals up from the roots through the xylem. This process not only helps in the cooling of the plant but also facilitates the movement of nutrients necessary for growth and development. Furthermore, transpiration aids in maintaining the plant's turgidity, which is essential for structural support.
| $4. Can plants reproduce without seeds? If so, how? | |
Ans. Yes, plants can reproduce without seeds through a process known as asexual reproduction. This can occur through various methods, such as vegetative propagation, where parts of the plant, such as stems, roots, or leaves, grow into new individuals. Common examples include runners in strawberries, tubers in potatoes, and cuttings from plants like succulents. Asexual reproduction allows for rapid population growth and the ability to produce genetically identical offspring, which can be advantageous in stable environments.
| $5. What are the differences between photosynthesis and respiration in plants? | |
Ans. Photosynthesis and respiration are two essential but opposite processes in plants. Photosynthesis occurs in the chloroplasts of plant cells, where light energy is used to convert carbon dioxide and water into glucose and oxygen. This process is crucial for energy storage. In contrast, respiration takes place in the mitochondria, where glucose is broken down to release energy for cellular activities, producing carbon dioxide and water as byproducts. While photosynthesis stores energy, respiration releases it, highlighting the interconnected nature of these processes in the plant life cycle.
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