Class 9 Exam > Class 9 Notes > Science Class 9 > Worksheet: The Fundamental Unit of Life
The Fundamental Unit of Life Class 9 Worksheet Science Chapter 5
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| Multiple Choice Questions |
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| Fill in the blanks |
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| Crossword Puzzle |
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| Very Short Answer Questions |
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| Short Answer Questions |
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Multiple Choice Questions
Q.1.Cells were first discovered by _____.
(a) Chadwick
(b) Dalton
(c) Robert Hooke
(d) None of these
Q.2. Amoeba acquires its food through _____.
(a) Endocytosis
(b) Plasmolysis
(c) Cell organelles
(d) None of these
Q.3. _______ impart beautiful colors to flowers to attract insects for pollination.
(a) Centrosome
(b) Chromoplasts
(c) Plastids
(d) Vacuole
Q.4. Ribosomes carry out _____ synthesis.
(a) Protein
(b) Lipids
(c) Enzymes
(d) All of these
Fill in the blanks
(i) ____ is the study of living organisms.
(ii) ___ is the basic structural and functional unit of life.
(iii) ____ is commonly called the physical basis of life.
(iv) _____ protects the cells against pathogens.
(v) Transporting channel of the cell is______.
Crossword Puzzle
Q1:
ACROSS
3. ___stands DeoxyriboNucleic Acid
6. These are important for photosynthesis in plants
DOWN
1. They are the powerhouses of the cell
2. Paramoecium is a ____________ organisms
4. It is a kind of waste disposal system of the cell
5. One of the biologists who presented the cell theory
Very Short Answer Questions
Q1: Where are proteins synthesized inside the cell?
Q2: Which organelle is known as the powerhouse of the cell? Why?
Q3: Why are lysosomes known as suicide bags?
Q4: If the organization of a cell is destroyed due to some physical or chemical influence, what will happen?
Q5: Where do lipids and proteins get synthesized?
Q6: What would happen if the plasma membrane breaks down?
Short Answer Questions
Q1: Who discovered cells in living organisms? Give an example of the unicellular organism.
Q2: Why is the cell called the structural and functional unit of life?
Q3: What is the function of plastids?
Q4: Why do mitochondria have a largely folded inner membrane?
You can find Worksheets Solutions here: Worksheet Solutions: The Fundamental Unit of Life
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FAQs on The Fundamental Unit of Life Class 9 Worksheet Science Chapter 5
| 1. What is the fundamental unit of life? |  |
Ans. The fundamental unit of life is the cell. All living organisms are made up of cells, which are the basic structural and functional units of life.
| 2. What is the function of a cell membrane? | |
Ans. The cell membrane is a thin, flexible barrier that surrounds the cell and controls the movement of substances in and out of the cell. It helps maintain the shape of the cell and protects its internal structures.
| 3. How do cells reproduce? | |
Ans. Cells reproduce through a process called cell division. There are two types of cell division - mitosis and meiosis. Mitosis is a form of cell division that produces two identical daughter cells, while meiosis is a specialized form of cell division that produces gametes (sex cells) with half the number of chromosomes.
| 4. What are the different types of cells in multicellular organisms? | |
Ans. Multicellular organisms are made up of different types of cells that perform specific functions. Some common types of cells include muscle cells, nerve cells, skin cells, blood cells, and bone cells. Each type of cell is specialized to carry out a particular function in the body.
| 5. How are cells organized to form tissues and organs? | |
Ans. Cells with similar structures and functions come together to form tissues. Different tissues then work together to form organs, which carry out specific functions in the body. For example, muscle tissue consists of muscle cells that contract and relax to produce movement, and the heart is an organ made up of different types of tissues that work together to pump blood.
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