FAQs on Life Processes- 1 Chapter Notes - Science Class 10
|1. What is the process of photosynthesis?
Ans. Photosynthesis is the process by which green plants, algae, and some bacteria convert sunlight, carbon dioxide, and water into glucose and oxygen. This process occurs in the chloroplasts of plant cells, specifically in the chlorophyll pigment. The glucose produced is used as a source of energy for the plant, while the oxygen is released into the atmosphere.
|2. How does photosynthesis contribute to the nutrition of plants?
Ans. Photosynthesis is the primary source of nutrition for plants. Through this process, plants produce glucose, which serves as their source of energy for growth, development, and various metabolic activities. Glucose is used to synthesize other organic compounds, such as starch, cellulose, and proteins, which are essential for the plant's structure and function.
|3. How does nutrition in humans differ from nutrition in other organisms?
Ans. Nutrition in humans differs from nutrition in other organisms in several ways. Unlike plants, humans are unable to perform photosynthesis and produce their own food. Instead, they rely on consuming other organisms or their products to obtain nutrients. Humans require a balanced diet that includes carbohydrates, proteins, fats, vitamins, and minerals to meet their nutritional needs. Additionally, humans have a more complex digestive system compared to other organisms, allowing for the breakdown and absorption of nutrients.
|4. What are the different modes of nutrition in other organisms?
Ans. Other organisms can have different modes of nutrition, depending on their ecological niche and evolutionary adaptations. Some organisms are autotrophs, such as plants and algae, which produce their own food through photosynthesis. Others are heterotrophs, which obtain their nutrition by consuming other organisms or organic matter. Heterotrophs can further be classified into herbivores (eat plants), carnivores (eat other animals), and omnivores (eat both plants and animals). Some organisms, like fungi and bacteria, are decomposers, obtaining their nutrition by breaking down dead organic matter.
|5. How does the human digestive system contribute to the process of nutrition?
Ans. The human digestive system plays a vital role in the process of nutrition. It is responsible for breaking down ingested food into smaller molecules that can be absorbed and utilized by the body. The process begins with ingestion, followed by mechanical and chemical digestion in the mouth, stomach, and small intestine. Enzymes and digestive juices help break down carbohydrates, proteins, and fats into simpler forms. The small intestine absorbs the digested nutrients, which are then transported to the bloodstream and delivered to cells throughout the body for energy production and other metabolic processes.