Class 7 Science - RAJASTHAN
Life Processes in Plants
The chapter 'Life Processes in Plants' for Class 7 Rajasthan Board students explores how plants survive, grow, and maintain life. It covers essential biological functions such as nutrition, where plants make their own food through photosynthesis, and transportation, detailing how water, minerals, and food travel through xylem and phloem. Students also learn about respiration and plant excretion. Understanding these processes is vital for board exams as it forms the foundation of plant biology, frequently appearing in both objective and descriptive questions.
Start Learning FreeKey Concepts
Photosynthesis
The process by which green plants prepare their own food using carbon dioxide and water in the presence of sunlight and chlorophyll.
Transportation in Plants
The movement of water and minerals absorbed by roots to the leaves, and the distribution of prepared food to all parts of the plant through vascular tissues.
Xylem and Phloem
Xylem is the tissue responsible for transporting water and minerals, while phloem transports food throughout the plant.
Respiration in Plants
The process by which plants break down food using oxygen to release energy for growth and daily activities, taking in gases through tiny pores called stomata.
Transpiration
The loss of water in the form of water vapor from the aerial parts of the plant, mainly through stomata, which helps in cooling and pulling water upward.
Important Formulas
Board Exam Info
This chapter typically carries around 6 to 8 marks in the Rajasthan Board Class 7 Science examinations. Common question types include fill in the blanks, short-answer questions defining key terms like photosynthesis and transpiration, and diagram-based questions such as labeling the parts involved in plant transport.
Frequently Asked Questions
How do plants transport water to great heights like in tall trees?
Water is transported upward through xylem vessels aided by root pressure and the suction pull created by transpiration in the leaves.
What is the role of stomata in plants?
Stomata are tiny pores on leaves that help in the exchange of gases (oxygen and carbon dioxide) and also facilitate transpiration.
Why do plants need to respire if they perform photosynthesis?
Photosynthesis only makes food during the day using sunlight, but plants need energy 24/7 for growth and repair. Respiration breaks down that food to release energy continuously.
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