Introduction to Biotechnology — Flashcards
Maharashtra Board · Class 9 · Science
20 flashcards for Introduction to Biotechnology (Maharashtra Board Class 9 Science) to test yourself on key terms and facts.
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What is tissue? Give its definition.
Answer
A group of cells having the same origin, same structure and same function is called 'tissue'. For example, muscle tissue is made up of muscle cells that work together to bring about movement through c…
List the four main types of animal tissues.
Answer
The four main types of animal tissues are: 1. Epithelial tissue (protective coverings), 2. Connective tissue (joins different parts), 3. Muscular tissue (movement), 4. Nervous tissue (responds to stim…
What is epithelial tissue and where is it found?
Answer
Epithelial tissue forms protective coverings in the animal body. Cells are closely packed and form continuous layers. Examples: skin, mucous layer of mouth cavity, inner surface of blood vessels, wall…
Compare squamous epithelium and stratified epithelium in terms of structure and function.
Answer
Squamous epithelium: Thin, flat cells forming semipermeable membrane; allows selective transport; found in mouth, blood vessels. Stratified epithelium: Many layers of cells; prevents organ wearing and…
Why is blood considered a connective tissue?
Answer
Blood is a connective tissue because it connects different parts of the body by circulating and transporting materials. It contains different types of cells (RBCs, WBCs, platelets) in liquid plasma, a…
What are the three types of muscular tissues? Give one characteristic of each.
Answer
1. Striated muscles: Have alternate dark and light bands, voluntary, attached to bones. 2. Non-striated muscles: No bands, involuntary, found in internal organs. 3. Cardiac muscles: Have bands, involu…
What is the main function of nervous tissue and what are its main components?
Answer
Nervous tissue enables us to respond to stimuli like touch, sound, smell, etc. Main components: Cell body (contains cytoplasm and nucleus), Dendrites (small branched fibers), Axon (one extremely long …
What is meristematic tissue and where is it located in plants?
Answer
Meristematic tissue is responsible for plant growth. It contains cells with thick cytoplasm, conspicuous nucleus, thin cell wall, and no vacuoles. Located at: 1. Apical meristem (root and stem tips), …
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