Learn the key concepts of Science topic - Cell, Tissue and Structural Organization in Animals
Click to study the Complete Theory of Cell, Tissue and Structural Organization in Animals and practice a lot of questions difficulty wise on this biology topic that can be asked in your competitive exam.
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Cell, Tissue and Structural Organization in Animals FAQs
What is cell theory?
In 1838, Matthias Schleiden, a German botanist and in 1839, Theodor Schwann, a British zoologist, composed cell theory. Cell theory as understood today is:
- all organisms are composed of cells and products of cells.
- All cells arise from preexisting cell
Difference between prokaryotes and eukaryotes cells?
Prokaryotes |
Eukaryotes |
1. Nucleus is absent |
1. Nucleus is present with nuclear membrane |
2. Membrane bound organelle are absent |
2. Membrane bound organelle are present |
3. Complexity is much simpler |
3. More complex in nature and structure |
4. Cell structure is unicellular |
4. Cell structure is mostly multicellular, some unicellular |
5. Smaller in size |
5. Larger in size |
6. Genetic material is in circular form |
6. Genetic material is in linear form |
7. Examples- Bacteria and archaebacteria |
7. Examples- protista, fungi, plants, animals |
Explain cell envelope of prokaryotic cells.
Cell envelope of prokaryotic cells have 3 layers:
- Glycocalyx- tough layer called capsule.
- Cell wall- It determines shape and structure. It provides support and prevents cells from bursting.
- Plasma membrane- Semipermeable in nature.
What is the function of Golgi apparatus?
Golgi Apparatus:
- Discovered by camillo golgi
- Consist of flat or disc shape sac or cisternae
- Arranged near nucleus has 2 surface cis and trans
- Function is to package the material
- Help in glycoprotein and glycolipids synthesis
Mitochondria is also known as......
Power house of cell
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