Class 7 Science - BIHAR
Life Processes in Plants
The chapter 'Life Processes in Plants' for Class 7 Bihar Board science students explores how plants survive, grow, and maintain life. It covers essential biological processes including nutrition, photosynthesis, respiration, transportation of water and minerals through xylem and phloem, and reproduction in plants. Understanding these processes is crucial because plants are the primary producers of our ecosystem and form the foundation of biology concepts in higher classes. This chapter frequently appears in board school exams with objective questions, short-answer questions, and diagrams testing fundamental knowledge of plant physiology.
Start Learning FreeKey Concepts
Photosynthesis
The process by which green plants prepare their own food using carbon dioxide, water, and sunlight in the presence of chlorophyll.
Transportation in Plants
The movement of water and minerals absorbed by roots to leaves through tissue called xylem, and food prepared in leaves to other parts through phloem.
Respiration in Plants
The process by which plants break down glucose to release energy for growth, taking in oxygen and giving out carbon dioxide through tiny pores called stomata.
Transpiration
The loss of excess water in the form of water vapor from the aerial parts of plants, mainly through stomata.
Plant Reproduction
The process by which plants produce new individuals, occurring through vegetative propagation, sexual reproduction involving flowers, or asexual spore formation.
Important Formulas
Board Exam Info
In Bihar Board Class 7 science examinations, this chapter typically carries around 6 to 8 marks. Common question types include fill-in-the-blanks, matching columns, labeling plant parts or processes in diagrams, and short answer questions explaining photosynthesis and transpiration.
Frequently Asked Questions
Why do plants need stomata?
Stomata are tiny pores on leaves that help in the exchange of gases (oxygen and carbon dioxide) and also aid in the loss of water through transpiration.
How do roots absorb water from the soil?
Roots absorb water and minerals from the soil through root hairs by a process called absorption, which then travels upward through the xylem vessels.
Do plants respire during the daytime?
Yes, plants respire 24 hours a day, taking in oxygen and releasing carbon dioxide, but during daytime, the rate of photosynthesis is much higher than respiration.
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