Plant Tissues and Anatomy — Flashcards
Maharashtra Board · Class 11 · Biology
24 flashcards for Plant Tissues and Anatomy (Maharashtra Board Class 11 Biology) to test yourself on key terms and facts.
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What is a tissue? Define and explain the basis of classification of plant tissues.
Answer
A tissue is a group of similar or dissimilar cells having essentially a common function and origin. Plant tissues are classified into two main types based on their ability to divide: (1) Meristematic …
List the characteristics of meristematic tissue.
Answer
Characteristics of meristematic tissue: (1) Young cells with ability to divide, (2) Polyhedral or isodiametric shape without intercellular spaces, (3) Thin, elastic cell wall mainly composed of cellul…
Classify meristematic tissue based on position and explain each type.
Answer
Based on position: (1) Apical meristem - at root and shoot tips, increases length, (2) Intercalary meristem - at nodes, mainly in monocots, short-lived, (3) Lateral meristem - along sides of central a…
What are the three types of meristem based on function?
Answer
Based on function: (1) Protoderm - forms protective covering like epidermis, (2) Procambium - develops primary vascular tissue, (3) Ground meristem - forms cortex, endodermis, pericycle, medullary ray…
Compare parenchyma, collenchyma, and sclerenchyma tissues.
Answer
Parenchyma: Thin-walled, living, isodiametric cells with intercellular spaces, functions in storage and photosynthesis. Collenchyma: Living cells with unevenly thickened cellulosic walls at corners, p…
What are the two types of sclerenchyma? Differentiate between them.
Answer
Two types: (1) Fibres - thread-like, elongated, narrow with tapering ends, occur in bundles, narrow unbranched oblique pits, provide mechanical strength. (2) Sclereids - broad with blunt ends, occur s…
What are the components of xylem tissue and their functions?
Answer
Xylem components: (1) Tracheids - elongated dead cells with lignified walls, conduct water and provide support, (2) Vessels - formed by vessel elements, wider lumen than tracheids, main conducting ele…
Describe the different types of thickening patterns in tracheids and vessels.
Answer
Thickening patterns: (1) Annular - ring-like thickenings, (2) Spiral - spring/helix-like thickenings, (3) Scalariform - ladder-like thickenings, (4) Reticulate - net-like thickenings, (5) Pitted - mos…
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