Class 10 Science — Chapter 5: Life Processes

What you'll learn

• ▸Characteristics of Living Organisms
• ▸Overview of Essential Life Processes
• ▸Limitations of Diffusion in Multicellular Organisms
• ▸Modes of Nutrition: Autotrophic vs. Heterotrophic
• ▸Autotrophic Nutrition: Photosynthesis
• ▸Process and Events of Photosynthesis
• ▸Site and Raw Materials for Photosynthesis

Chapter Summary

--- PAGE 1 --- CHAPTER 5 Life Processes 1064CH06 How do we tell the difference between what is alive and what is not alive? If we see a dog running, or a cow chewing cud, or a man shouting loudly on the street, we know that these are living beings. What if the dog or the cow or the man were asleep? We would still think that they were alive, but how did we know that? We see them breathing, and we know that they are alive. What about plants? How do we know that they are alive? We see them green, some of us will say. But what about plants that have leaves of colours other than green? They grow over time, so we know that they are alive, some will say. In other words, we tend to think of some sort of movement, either growth-related or not, as common evidence for being alive. But a plant that is not visibly growing is still alive, and some animals can breathe without visible movement. So using visible movement as the defining characteristic of life is not enough. Movements over very small…

Practice Questions from this Chapter

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1. Define essential life processes simply. Get Solution →
2. Compare plant and animal energy needs. Get Solution →
3. Illustrate different types of nutrition. Get Solution →
4. What are the maintenance processes that must continue even when an organism is resting called? Get Solution →
5. What is the process of transferring a source of energy, like food, from outside the body to the inside called? Get Solution →
6. Organisms that use simple food material obtained from inorganic sources like carbon dioxide and water are known as what? Get Solution →
7. What is the process of acquiring oxygen and using it to break down food for cellular needs called? Get Solution →
8. In plants, what form are carbohydrates stored in when they are not immediately used for energy? Get Solution →

Did you know?

• 💡 Our bodies replace nearly all cells every seven to ten years.
• 💡 Some deep-sea bacteria create energy from chemicals, not sunlight.
• 💡 A Venus flytrap counts to five before closing its trap on prey.
• 💡 Viruses are debated as alive because they lack independent molecular movement.
• 💡 Photosynthesis produces most of the oxygen we breathe every single day.

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