New Cells Generate from

  • (a) Bacterial Fermentation
  • (b) Regeneration of Old Cells
  • (c) Pre-existing Cells
  • (d) Abiotic Materials

Answer:

The correct answer is (c) pre-existing cells. This statement was given by Rudolf Virchow.

NCERT Solutions for Class 11 Biology Chapter 8 Cell The Unit of Life

NCERT Solutions for class 11 Chapter 8 Cell The Unit of Life: The chapter on Cell: The Unit of Life is important for students approaching the home exams. This article introduces NCERT solutions designed to help students explain the concepts of further learning and how to write to get good grades on exams. The solutions are presented in very simple language for ease of understanding.

NCERT CBSE Chapter 8 Cell The Unit of Life of Class 11 explains that all living organisms are made up of smaller units, called cells. Cells provide structure and function for all living things. A cell has three main parts, i.e. cell membrane, nucleus and cytoplasm. When the cells become damaged, our body makes new cells and replaces the damaged cells. This process is called cell division. Small organ-like structures present inside a cell are known as cell organelles. Revise the basic concepts of Cell: The Unit of Life for quick revision and class notes.

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Q1: Which of the Following is not Correct?

(a) Robert Brown discovered the cell. (b) Schleiden and Schwann formulated the cell theory. (c) Virchow explained that cells are formed from pre-existing cells. (d) A unicellular organism carries out its life activities within a single cell....

Q2: New Cells Generate from

(a) Bacterial Fermentation (b) Regeneration of Old Cells (c) Pre-existing Cells (d) Abiotic Materials...

Q3: Match the Following

Column I Column II (a) Cristae (i) Flat membranous sacs in stroma (b) Cisternae (ii) Infoldings in mitochondria (c) Thylakoids (iii) Disc-shaped sacs in Golgi apparatus...

Q4: Which of the following is correct?

(a) Cells of all living organisms have a nucleus. (b) Both animal and plant cells have a well-defined cell wall. (c) In prokaryotes, there are no membrane-bound organelles. (d) Cells are formed de novo from abiotic materials...

Q5: What is a Mesosome in a Prokaryotic Cell? Mention the Functions that it Performs.

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Q6: How do Neutral Solutes move across the Plasma Membrane? Can the Polar Molecules also move across it in the same way? If not, how are these Transported Across the Membrane?

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Q7: Name two cell Organelles that are Double Membrane-Bound. What are the Characteristics of these two Organelles? State their Functions and draw Labelled Diagrams of Both.

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Q8: What are the Characteristics of Prokaryotic Cells?

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Q9: Multicellular Organisms have a Division of Labour. Explain.

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Q10: The Cell is the Basic Unit of Life. Discuss in brief.

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Q11: What are Nuclear Pores? State their function.

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Q12: Both Lysosomes and Vacuoles are Endomembrane Structures, yet they Differ in Terms of their Functions. Comment.

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Q13: Describe the Structure of the following with the help of Labelled Diagrams.

(i) Nucleus (ii) Centrosome...

Q14: What is a Centromere? How does the position of the Centromere form the basis of the classification of Chromosomes? Support your answer with a Diagram showing the Position of the Centromere on different types of Chromosomes.

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