Class 9 Science - KERALA
Tissues in Action
The chapter 'Tissues in Action' in Class 9 Kerala SCERT Science explores how cells group together to form tissues, which are specialized to perform specific functions in multicellular plants and animals. Students will learn about plant tissues like meristematic and permanent tissues, and animal tissues including epithelial, connective, muscular, and nervous tissues. Understanding these structures is crucial because they form the basis of organ systems and physiological processes. This chapter is a high-scoring area in the Kerala State Board exams, frequently featuring direct questions, diagrams, and application-based problems regarding tissue functions and locations.
Start Learning FreeKey Concepts
Meristematic Tissue
Active dividing tissues found at the growing tips of roots and stems that are responsible for plant growth.
Permanent Tissue
Cells derived from meristematic tissue that have lost the ability to divide and have attained a definite shape, size, and function.
Epithelial Tissue
The protective covering tissue in animals that lines body surfaces, cavities, and organs.
Connective Tissue
Animal tissues that bind, support, and anchor other tissues and organs, including blood, bone, and cartilage.
Muscular and Nervous Tissues
Muscular tissue is responsible for body movements, while nervous tissue transmits electrical impulses to coordinate body functions.
Important Formulas
Board Exam Info
In the Kerala (SCERT) Class 9 Biology examinations, this chapter typically carries around 6 to 10 marks. Common question types include identifying tissue diagrams, differentiating between plant and animal tissues, short notes on the functions of various tissues, and reasoning-based questions.
Frequently Asked Questions
What is the main difference between meristematic and permanent tissues?
Meristematic tissues consist of actively dividing cells responsible for growth, whereas permanent tissues are formed from meristematic cells that have lost the capacity to divide and are specialized for specific tasks.
Why is blood considered a connective tissue?
Blood connects different body organs, transports oxygen, nutrients, and waste products, and has a fluid extracellular matrix called plasma, which fits the definition of connective tissue.
Where are apical meristems located in plants?
Apical meristems are located at the growing tips of roots and stems, and they are responsible for the increase in the length of the plant.
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