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ICSE Class 7 Biology Question 2 of 10

Plant Tissues — Question 2

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Question 2

State the differences between parenchyma, collenchyma and sclerenchyma tissues with diagrams.

Answer
Sl.
No.		ParenchymaCollenchymaSclerenchyma
1.Cells are thin walledCells are thick walledCells have walls thickened with lignin
2.Cells are livingCells are livingCells are dead
3.Cells are oval, spherical or cylindrical in shapecells are circular, oval or polygonalCells are elongated and have tapering ends
4.Present in all parts of plant bodyFound below epidermis in young stems and petiolesFound in stems and veins of leaves
5.Intercellular spaces are presentIntercellular spaces are generally absent.Intercellular spaces are absent
6.Participate in photosynthesis and store foodProvide structural support to growing stems and leaves.Provide mechanical strength to stem.

The diagrams are shown below:

Parenchyma

State the differences between parenchyma, collenchyma and sclerenchyma tissues with diagrams. Plant Tissues, Living Science Biology Ratna Sagar Solutions ICSE Class 7.

Collenchyma

State the differences between parenchyma, collenchyma and sclerenchyma tissues with diagrams. Plant Tissues, Living Science Biology Ratna Sagar Solutions ICSE Class 7.

Sclerenchyma

State the differences between parenchyma, collenchyma and sclerenchyma tissues with diagrams. Plant Tissues, Living Science Biology Ratna Sagar Solutions ICSE Class 7.

Chapter 4: Tissue — ICSE Class VII Biology Notes

Complete ICSE Class VII Biology notes on Tissue covering meristematic and permanent plant tissues (parenchyma, collenchyma, sclerenchyma, xylem, phloem) and four animal tissue types with examples and diagrams.

Key Concepts and Topics

Topics covered: Meristematic tissue, Permanent tissue, Animal tissues, Xylem, Phloem

Weightage: Approximately 8 marks in the exam

Important Points to Remember

  • Tissue: group of similar cells performing specific function
  • Meristematic tissue: actively dividing cells at growth points
  • Simple permanent: parenchyma (storage), collenchyma (flexibility), sclerenchyma (strength)
  • Complex permanent: xylem (water up) and phloem (food both ways)
  • Four animal tissues: epithelial, connective, muscular, nervous
  • Three muscle types: skeletal, smooth, cardiac
  • Blood is a connective tissue with liquid matrix

Frequently Asked Questions

Q: What is a tissue?

A: A tissue is a group of similar cells that perform a specific function together.

Q: What is the difference between xylem and phloem?

A: Xylem transports water upward and is made of dead cells. Phloem transports food in both directions and is made of living cells.

Q: Why is blood called a connective tissue?

A: Because it connects all body parts by transporting nutrients, oxygen, and waste, even though its matrix (plasma) is liquid.

Exam Preparation Tips

  • Focus on understanding concepts rather than rote memorization
  • Practice drawing and labelling diagrams regularly
  • Use comparison tables for topics that require differentiation
  • Solve previous year questions and practice papers
  • Review the chapter notes provided by Bright Tutorials for comprehensive coverage

For complete chapter notes, practice questions, and test papers, contact Bright Tutorials at 9403781999.