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How do you think your observation of this hidden world might change the way you think about size, complexity or even what counts as ‘living’?
Observing the invisible world would make us realize that even the tiniest creatures have complex structures and vital roles. It would expand our understanding of life, showing that microbes—though invisible to the naked eye—are crucial for survival, digestion and ecosystems. We’d learn that size doeRead more
Observing the invisible world would make us realize that even the tiniest creatures have complex structures and vital roles. It would expand our understanding of life, showing that microbes—though invisible to the naked eye—are crucial for survival, digestion and ecosystems. We’d learn that size doesn’t limit life’s complexity and that our definition of “living” must include microorganisms as well.
For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions/class-8/science/
See lessHave you thought how these tiny living beings interact with each other?
Tiny living beings interact through cooperation, competition and communication. For example, some bacteria help plants grow, while others may cause disease. In our bodies, helpful microbes digest food and keep harmful ones away. These complex relationships among microorganisms affect ecosystems, humRead more
Tiny living beings interact through cooperation, competition and communication. For example, some bacteria help plants grow, while others may cause disease. In our bodies, helpful microbes digest food and keep harmful ones away. These complex relationships among microorganisms affect ecosystems, human health and even weather. Understanding these interactions helps us appreciate their role in nature and how they influence larger living systems.
For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions/class-8/science/
See lessVarious parts of a cell are given below. Write them in the appropriate places in the following diagram. Nucleus, Cytoplasm, Chloroplast, Cell wall, Cell membrane, Nucleoid
Animal cells contain nucleus, cytoplasm and a cell membrane. Plant cells also include a cell wall and chloroplasts, essential for photosynthesis. Bacterial cells don’t have a true nucleus but have a nucleoid, cell membrane and cytoplasm. This classification helps identify how different life forms arRead more
Animal cells contain nucleus, cytoplasm and a cell membrane. Plant cells also include a cell wall and chloroplasts, essential for photosynthesis. Bacterial cells don’t have a true nucleus but have a nucleoid, cell membrane and cytoplasm. This classification helps identify how different life forms are structured. Understanding which parts belong to which type of cell is crucial for studying the diversity of living organisms.
For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions/class-8/science/
See lessAanandi took two test tubes and marked them A and B. She put two spoonfuls of sugar solution in each of the test tubes. In test tube B, she added a spoonful of yeast. Then she attached two incompletely inflated balloons to the mouth of each test tube. She kept the set-up in a warm place, away from sunlight. (i) What do you predict will happen after 3–4 days? She observed that the balloon attached to test tube B was inflated. What can be a possible explanation for this? (a) Water evaporated in test tube B and filled the balloon with the water vapour. (b) The warm atmosphere expanded the air inside the test tube B, which inflated the balloon. (c) Yeast produced a gas inside the test tube B which inflated the balloon. (d) Sugar reacted with warm air, which produced gas, eventually inflating the balloon. (ii) She took another test tube, 1/4 filled with lime water. She removed the balloon from test tube B in such a manner that the gas inside the balloon did not escape. She attached the balloon to the test tube with lime water and shook it well. What do you think she wants to find out?
(i) In test tube B, yeast breaks down the sugar and produces carbon dioxide as a result of fermentation. This gas rises and inflates the balloon. Since test tube A doesn’t contain yeast, no gas is formed and the balloon remains flat. This experiment clearly shows how living microorganisms like yeastRead more
(i) In test tube B, yeast breaks down the sugar and produces carbon dioxide as a result of fermentation. This gas rises and inflates the balloon. Since test tube A doesn’t contain yeast, no gas is formed and the balloon remains flat. This experiment clearly shows how living microorganisms like yeast can produce gases during metabolic activity, proving their role in fermentation.
(ii) By attaching the balloon to the lime water test tube, Aanandi is checking whether the gas inside the balloon is carbon dioxide. If lime water turns milky, it proves the presence of CO₂, confirming that yeast produced it during fermentation. This is a classic test for carbon dioxide and helps link microbial activity with chemical changes that can be observed through simple experiments.
For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions/class-8/science/
See lessA farmer was planting wheat crops in his field. He added nitrogen-rich fertiliser to the soil to get a good yield of crops. In the neighbouring field, another farmer was growing bean crops, but she preferred not to add nitrogen fertiliser to get healthy crops. Can you think of the reasons?
The bean farmer avoided nitrogen fertiliser because legumes like beans have a natural advantage. Their roots contain nodules that host nitrogen-fixing bacteria. These microbes convert atmospheric nitrogen into forms usable by plants. This natural process provides enough nitrogen for healthy crop groRead more
The bean farmer avoided nitrogen fertiliser because legumes like beans have a natural advantage. Their roots contain nodules that host nitrogen-fixing bacteria. These microbes convert atmospheric nitrogen into forms usable by plants. This natural process provides enough nitrogen for healthy crop growth, unlike wheat, which lacks such bacteria and needs nitrogen fertilisers. Thus, legumes help in maintaining soil fertility without external inputs.
For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions/class-8/science/
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