Ssc Biology Chapter 2 Hand Note Exclusive ✨

SSC Biology Chapter 2 Hand Notes Exclusive: A Comprehensive Guide

3. Differences between Plant Cell and Animal Cell

| Feature | Plant Cell | Animal Cell | | :--- | :--- | :--- | | Cell Wall | Present (made of cellulose). | Absent. | | Plastids | Present (Chloroplast, Chromoplast, Leucoplast). | Absent. | | Vacuole | Large, permanent central vacuole. | Small, temporary, and numerous. | | Centrosome | Absent (in higher plants). | Present. | | Shape | Fixed, rectangular/hexagonal shape. | Irregular shape due to lack of wall. | | Starch | Stores starch. | Stores glycogen. | ssc biology chapter 2 hand note exclusive

Hand notes prioritize these "Powerhouse" and "Control Center" concepts: Nucleus: The control center containing DNA. SSC Biology Chapter 2 Hand Notes Exclusive: A

🧬 1. The Cell (জীবকোষ)

• Definition: The structural and functional unit of life.
• Discovery: Robert Hooke (1665) – observed cork cells.
• Cell Theory (Schleiden & Schwann + Virchow):

  Apical Meristem: Found at shoot and root tips; responsible for lengthening (primary growth). Definition: The structural and functional unit of life

  The chapter concludes by explaining how tissues form organs (like the heart or stomach) and how these organs work together in systems (Digestive, Excretory, Reproductive, etc.) to maintain life. 💡 SSC Exam Tips for Chapter 2:

  Function: It is the site of Oxidative Phosphorylation and produces ATP (Adenosine Triphosphate).

• Why are lysosomes called suicidal bags?