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Life Processes

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NCERT Solutions for Class 10 Science Chapter 5

The Life Processes chapter in your 10th standard science class covers the essential functions that keep living organisms alive and functioning. Here’s a summary of the key points:

1. Nutrition:

  • All living things need to take in nutrients from their environment.
  • These nutrients provide energy for growth, repair, and various activities.
  • There are two main modes of nutrition:
    • Autotrophic nutrition: Organisms like plants make their own food using sunlight, water, and carbon dioxide (photosynthesis).
    • Heterotrophic nutrition: Animals and many other organisms obtain food by consuming other living things or their byproducts.

2. Respiration:

  • Living things need to break down nutrients to release energy.
  • Respiration is the process of using oxygen to break down glucose (sugar) and release energy.
  • There are two main types of respiration:
    • Aerobic respiration: Requires oxygen (O₂) and produces carbon dioxide (CO₂) and water (H₂O) as waste products.
    • Anaerobic respiration: Occurs in the absence of oxygen (O₂) and produces different waste products like lactic acid or ethanol.

3. Transportation:

  • Organisms need to transport materials like nutrients, oxygen, and waste products throughout their bodies.
  • In complex organisms, this transportation is facilitated by a circulatory system involving blood and vessels.
  • In simpler organisms, diffusion plays a more significant role in transporting materials.

4. Excretion:

  • Living organisms produce waste products as a result of their metabolic processes.
  • Excretion is the process of removing these waste products from the body.
  • Different organs like kidneys and lungs play a role in excretion in various organisms.

5. Control and Coordination:

  • Living things need to be able to respond to their environment and maintain internal stability.
  • This is achieved through a complex system involving the nervous system and hormones.
  • The nervous system sends signals to different parts of the body to coordinate responses.
  • Hormones are chemical messengers that regulate various bodily functions.

NCERT Solutions for Class 10 Science Chapter 5 : Life Processes

Questions (Page 81)

1. Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans ?

Ans : Diffusion is too slow for big guys like us! Our cells are far from oxygen and constantly crave it. Diffusion just can’t deliver fast enough, so we have a special transport system (blood!) to get oxygen where it needs to go.

2. What criteria do we use to decide whether something is alive ?

Ans : Living things are like the ultimate seven:

  1. Organized: They have complex structures, from tiny cells to whole bodies.
  2. Eat & Breathe: They use energy (metabolism) to function.
  3. Stable Inside: They keep things like temperature and water balance just right (homeostasis).
  4. Grow Big: They increase in size and complexity (growth and development).
  5. Make Copies: They reproduce to create new generations.
  6. React to Stuff: They respond to their environment (stimuli).
  7. Change Over Time: They can adapt to survive in different conditions.

3. What are outside raw materials used by an organism ?

Ans : All living things need stuff from outside to survive:

  • Everyone: Water (gotta stay hydrated!).
  • Plants: Food factory! They use sunlight, carbon dioxide (from air) and minerals (from soil/water) to make their own food.
  • Animals: We eat food (for energy) and breathe oxygen (for energy production).

The exact needs can vary, but these are the essentials!

4.What processes would you consider essential for maintaining life ?

Ans : 

1. Nutrition: Obtaining and using nutrients for energy, growth, and repair. This can involve photosynthesis in plants or consuming food in animals.

2. Respiration: Breaking down nutrients to release usable energy, often using oxygen (aerobic respiration) but sometimes not (anaerobic respiration).

3. Transport: Moving materials like nutrients, oxygen, and waste products throughout the organism. This can involve complex circulatory systems in multicellular organisms.

4. Excretion: Removing waste products generated by cellular processes. This can involve organs like kidneys and lungs

.5. Homeostasis: Maintaining a stable internal environment despite external changes. This includes regulating factors like temperature, pH, and water balance.

NCERT Solutions for Class 10 Science Chapter 5 : Life Processes

Questions (Page 87)

1. What are the differences between autotrophic nutrition and heterotrophic nutrition ?

Ans : 

FeatureAutotrophic NutritionHeterotrophic Nutrition
Food SourceProduced by the organism itselfObtained from other organisms
Energy SourceSunlight (photosynthesis) or chemical reactions (chemosynthesis)Breakdown of organic molecules (carbohydrates, proteins, fats)
ExamplesPlants, algae, some bacteriaAnimals, fungi, most bacteria
AnalogySelf-sufficient chefsCustomers relying on restaurants

2. Where do plants get each of the raw materials required for photosynthesis ?

Ans : 

  • **Carbon Dioxide (CO₂) | Air Plants absorb carbon dioxide through tiny pores on their leaves called stomata.
  • Water (H₂O) | Soil Water is taken up by the roots of the plant and transported through the xylem to the leaves.
  • Sunlight (Light Energy) | Sun Plants capture sunlight using chlorophyll, a pigment present in their leaves.

3. What is the role of the acid in our stomach ?

Ans : 

  1. Breakdown of Food:
    • HCl helps break down complex food molecules, particularly proteins, into smaller and simpler components. This makes them easier for enzymes further down the digestive tract to break them down even further and ultimately absorb them into the bloodstream.
  2. Antibacterial Defense:
    • The highly acidic environment created by HCl in the stomach acts as a first line of defense against harmful bacteria and pathogens that might be ingested with food. The low pH (acidity) disrupts the bacterial cell membranes, leading to their destruction.

4. What is the function of digestive enzymes ?

Ans : Digestive enzymes are tiny chefs in your gut! They break down big food molecules (carbs, proteins, fats) into smaller pieces your body can actually absorb and use for energy.  Think of them as unlocking the goodness hidden inside your food!

5. How is the small intestine designed to absorb digested food ?

Ans : The small intestine is a champion absorber! Here’s how it wins:

  • More surface area: Folds and finger-like projections (villi) create tons of space for grabbing nutrients.
  • Tiny pumps: Special cells act like pumps, shoving absorbed nutrients (sugars, amino acids) into the bloodstream.
  • Blood vessel buddies: Nutrients hitch a ride on nearby blood vessels to travel throughout the body.
  • Fatty helpers: Lacteals (special vessels) absorb fats and transport them in a special package.

With all this teamwork, the small intestine efficiently absorbs everything your body needs from food!

NCERT Solutions for Class 10 Science Chapter 5 : Life Processes

Questions (Page 91)

1. What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration ?

Ans : Terrestrial organisms have a clear advantage over aquatic organisms when it comes to obtaining oxygen for respiration. 

Air vs. Water:

  • Oxygen Availability: The key difference lies in oxygen concentration. Air contains roughly 21% oxygen, while water holds a much lower percentage (typically less than 1%).

Obtaining Oxygen:

  • Terrestrial Advantage: Terrestrial organisms breathe in oxygen directly from the air. The high oxygen concentration in air allows them to obtain sufficient oxygen for respiration without needing to breathe excessively.
  • Aquatic Challenge: Aquatic organisms extract dissolved oxygen from water. The lower oxygen content in water necessitates that they breathe more frequently or have adaptations for efficient oxygen extraction (like gills).

In simpler terms:

  • Terrestrial organisms have easy access to a vast “oxygen ocean” (the air).
  • Aquatic organisms have to work harder to extract oxygen from a sparse “oxygen pool” (dissolved oxygen in water).

2. What are the different ways in which glucose is oxidised to provide energy in various organisms ?

Ans : 

Glucose, the primary fuel for cellular respiration, can be broken down to generate energy in various organisms through two main pathways, depending on the presence of oxygen:

1. Aerobic Respiration (With Oxygen):

  • Most Common: This is the predominant method used by most organisms, including humans, animals, and many plants (during the night when they don’t photosynthesize).
  • Oxygen Requirement: Oxygen (O₂) is essential for this process.
  • Energy Yield: Aerobic respiration is more efficient, generating a maximum of 38 ATP (adenosine triphosphate) molecules per glucose molecule. ATP is the cell’s energy currency.
  • Process: Glucose is broken down completely into carbon dioxide (CO₂) and water (H₂O) through a series of enzyme-controlled reactions in the mitochondria of cells.

2. Anaerobic Respiration (Without Oxygen):

  • Alternative Pathway: This process occurs when oxygen is limited or unavailable. It’s used by some bacteria, yeast during fermentation, and in human muscle cells during intense exercise.
  • Oxygen Independent: Anaerobic respiration does not require oxygen.
  • Lower Energy Yield: Anaerobic respiration is less efficient, generating only 2 ATP molecules per glucose molecule.
  • Product Variation: Depending on the organism and specific pathway, anaerobic respiration can produce various end products like lactic acid (in muscles), ethanol (in yeast fermentation), or hydrogen sulfide (in some bacteria).

3. How is oxygen and carbon dioxide transported in human beings ?

Ans : 

Oxygen In:

  1. We breathe in air.
  2. Oxygen hops on hemoglobin (a protein in red blood cells) like a taxi.
  3. Hemoglobin delivers oxygen to your cells.

Carbon Dioxide Out:

  1. Cells create carbon dioxide as waste.
  2. Carbon dioxide hops off the hemoglobin taxi and enters the bloodstream.
  3. We exhale carbon dioxide out of our lungs.

4. How are the lungs designed in human beings to maximise the area for exchange of gases ?

Ans : 

  • Millions of tiny balloons (alveoli) packed together create a massive surface area for gas exchange.
  • Folded lung walls are like extra party streamers, providing even more space for gas exchange.
  • Thin cell walls and a capillary network next to each balloon allow for quick and easy gas transfer.

This balloon party design maximizes the space for oxygen to enter your blood and carbon dioxide to leave, keeping your body happy and healthy!

NCERT Solutions for Class 10 Science Chapter 5 : Life Processes

Questions (Page 96)

1. What are the components of the transport system in human beings ? What are the functions of these components ?

Ans : 

The human transport system, also known as the circulatory system, is a complex network of organs and tissues that works together to deliver oxygen and nutrients to all parts of the body and remove waste products. Here are the key components and their functions:

1. Heart:

  • Function: The heart acts as a powerful pump, forcing blood to circulate throughout the body. It has four chambers that contract rhythmically to push blood in a specific direction.

2. Blood:

  • Function: Blood is the transport medium that carries oxygen, nutrients, waste products, and hormones throughout the body. It consists of plasma (liquid portion) and cells (red blood cells, white blood cells, and platelets).
    • Red blood cells: Contain hemoglobin, a protein that binds to oxygen, allowing its transport from the lungs to tissues.
    • White blood cells: Play a crucial role in the immune system, fighting infections.
    • Platelets: Involved in blood clotting and preventing excessive bleeding.

3. Blood Vessels:

  • Function: Blood vessels are a network of tubes that carry blood throughout the body. They come in three main types:
    • Arteries: Carry oxygen-rich blood away from the heart to tissues. They are thick-walled and elastic to withstand the pressure of blood flow.
    • Veins: Carry oxygen-depleted blood and waste products back to the heart. They are thinner-walled than arteries and have valves to prevent backflow.
    • Capillaries: Tiny, thin-walled vessels that connect arteries and veins. They allow for the exchange of gases, nutrients, and waste products between blood and tissues.

2. Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds ?

Ans : Mammals and birds breathe hard, so they need a super efficient way to deliver oxygen. That’s why they have double circulation!

  • Double Duty: Keeps oxygen-rich blood separate from oxygen-poor blood.
  • More Oxygen, More Fun: This ensures a constant supply of fresh oxygen to muscles and keeps them going strong!
  • Imagine: Mixing good and bad delivery trucks would be messy! Double circulation keeps the “good oxygen” deliveries flowing smoothly throughout the body.

3. What are the components of the transport system in highly organised plants?

Ans : In highly organized plants, the transport system is made up of specialized tissues called xylem and phloem. These vascular tissues work together to deliver water, minerals, and nutrients throughout the plant.

Xylem:

  • Function: Xylem is responsible for transporting water and dissolved minerals upwards from the roots to the leaves.
  • Components: Xylem is made up of dead, elongated cells called tracheids and vessels. These cells have hollow walls that allow for efficient water flow. Additionally, xylem may contain fibers for support.

Phloem:

  • Function: Phloem transports dissolved organic food materials (sugars, amino acids) produced by photosynthesis in the leaves to all parts of the plant, including roots, stems, flowers, and fruits.
  • Components: Phloem consists of living cells called sieve tube elements that are arranged end-to-end. These cells have perforated walls, allowing for the passage of food materials. Companion cells associated with sieve tube elements help in loading and unloading of food.

4. How are water and minerals transport in plants ?

Ans : Plants are clever drinkers! Here’s how they get water and nutrients up from their roots:

  • Tiny straw squad: Root hairs absorb water and minerals from the soil.
  • Highway in the sky: Xylem, a special plant tissue, acts like a straw that carries water and minerals upwards.
  • Leaf power: As leaves release water vapor (transpiration), it sucks water up the xylem like a straw!

This clever system ensures plants stay hydrated and get the nutrients they need to thrive!

5. How is food transported in plants ?

Ans : 

  • Phloem Truck: Imagine phloem as a tiny truck network!
  • Loading Up: Sugar is loaded into phloem trucks from the leaves (the “sugar factory”).
  • Delivery Time: The trucks carry sugar throughout the plant to areas that need it, like roots and growing tips.
  • Sweet Flow: A sugar concentration difference acts like a map, guiding the sugar flow.

Phloem keeps these tiny plant kitchens running smoothly by delivering food wherever it’s needed!

NCERT Solutions for Class 10 Science Chapter 5 : Life Processes

Questions (Page 98)

1. Describe the structure and functions of nephrons.

Ans : The nephrons are the tiny powerhouses of your kidneys, responsible for filtering your blood and producing urine. Each nephron consists of two main parts:

1. The glomerulus: This is a network of tiny capillaries where blood is filtered. It acts like a sieve, allowing water, wastes, and small molecules to pass through, while keeping blood cells and large proteins in the bloodstream.

2. The renal tubule: This is a long, winding tube that leads away from the glomerulus. It’s where the real magic happens! The renal tubule reabsorbs essential nutrients and water back into the bloodstream, while secreting waste products and excess water into the forming urine.

Here’s a breakdown of the renal tubule’s key sections:

  • Proximal convoluted tubule: Reabsorbs most of the water, salts, and glucose from the filtrate.
  • Loop of Henle: This hairpin-shaped loop plays a crucial role in concentrating urine. It helps remove excess water while conserving important salts.
  • Distal convoluted tubule: Fine-tunes the composition of urine by regulating water and electrolyte balance.
  • Collecting duct: Drains urine from multiple nephrons into the ureter, the tube that carries urine to the bladder.

Overall, nephrons function through a combination of filtration, reabsorption, and secretion:

  • Filtration: Removes waste products, excess water, and toxins from the blood.
  • Reabsorption: Retains essential nutrients and water back into the bloodstream, preventing their loss in urine.
  • Secretion: Eliminates certain substances like hydrogen ions and drugs from the blood into the urine.

2. What are the methods used by plants to get rid of excretory products ?

Ans : Plants don’t have fancy plumbing like us, but they clean house in clever ways!

  • Tiny Trash Bins: Plants store waste products in compartments called vacuoles inside their cells.
  • Gaseous Goodbye: Waste gases like carbon dioxide leave through tiny pores on leaves (stomata).
  • Stinky Strategy: Some plants make special chemicals for waste or defense, storing them in bark or leaves.
  • Out with the Old: As leaves die and bark peels, they take some waste with them.

3. How is the amount of urine produced regulated ?

Ans : 

  • Well-hydrated? More dilute urine (lots of water to get rid of).
  • Dehydrated? Less urine (gotta conserve water!).
  • Special hormone (ADH): Tells your kidneys when to hold onto water (ADH up) or let it go (ADH down).
  • Blood volume & pressure drop? Hold onto water (ADH up) to keep things balanced!

NCERT Solutions for Class 10 Science Chapter 5 : Life Processes

Exercise 

1. The kidneys in human beings are a part of the system for

(i) nutrition

(ii) respiration

(iii) excretion

(iv) transportation

Ans : (iii) excretion.

2. The xylem in plants are responsible for

(i) transport of water

(ii) transport of food

(iii) transport of amino acids

(iv) transport of oxygen

Ans : (i) transport of water

3. The autotrophic mode of nutrition requires

(i) carbon dioxide and water

(ii) chlorophyll

(iii) sunlight

(iv) all of the above

Ans : (iv) all of the above.

4. The breakdown of pyruvate to give carbon dioxide, water and energy takes place in

(i) cytoplasm

(ii) mitochondria

(iii) chloroplast

(iv) nucleus

Ans : (ii) mitochondria

5. How are fats digested in our bodies ? Where does this process take place ?

Ans : Fat digestion is a fascinating journey that starts in your mouth and finishes in your small intestine. 

The Breakdown Begins:

  • Mouth: While minimal fat digestion happens here, the enzyme lingual lipase on your tongue can break down some small fat globules as you chew your food.

The Main Stage: The Small Intestine

  • Emulsification: This is where the magic happens! As food enters the small intestine, your liver releases bile, a green fluid containing bile salts. These bile salts act like tiny detergents, breaking down large fat globules into smaller particles called micelles. This makes them easier to digest.
  • Pancreatic Lipase: Your pancreas releases an enzyme called lipase, which specifically targets the fat molecules within the micelles. Lipase breaks down these fats into smaller components like glycerol and fatty acids.

Absorption and Transportation:

  • Absorption: Once broken down, these smaller fat components (glycerol and fatty acids) can be absorbed by the intestinal lining.
  • Packaging and Delivery: These components are then packaged with proteins and cholesterol to form tiny particles called chylomicrons. Chylomicrons are released into the lymphatic system, which eventually delivers them to the bloodstream.

The Final Destination:

  • Energy or Storage: The fatty acids released from fat digestion can be used by your body for immediate energy needs or stored for later use in fat cells.

6. What is the role of saliva in the digestion of food ?

Ans : Your mouth isn’t just for talking! Saliva does 3 things to kickstart digestion:

  1. Smooth Operator: Makes swallowing food easier.
  2. Sugar Sneak Peek: Breaks down some carbs to get them ready for later.
  3. Germ Patrol: Fights some bacteria in your mouth (not the main goal though).

7. What are the necessary conditions (or autotrophic nutrition and what are its by-products ?

Ans : Autotrophic nutrition is the process by which organisms produce their own food. 

Necessities for Autotrophic Nutrition:

  • Light Source: Sunlight is the primary energy source for most autotrophs. They capture this energy using pigments like chlorophyll.
  • Carbon Dioxide (CO2): This gas serves as the building block for organic molecules (sugars) that the organism produces.
  • Water (H2O): Another crucial building block and a participant in the reactions that convert light energy into usable energy.
  • Chlorophyll: This pigment, found in plants and some other autotrophs, absorbs sunlight and plays a key role in capturing light energy for food production.

By-products of Autotrophic Nutrition:

  • Organic Compounds (Sugars): The main product of autotrophic nutrition is the creation of organic molecules, primarily sugars (glucose) used by the organism for energy and growth.
  • Oxygen (O2): As a byproduct of the process (photosynthesis) used by most autotrophs, oxygen is released into the environment.

8. What are the differences between aerobic and anaerobic respiration ? Name some organisms that use the anaerobic mode of respiration.

Ans : 

FeatureAerobic RespirationAnaerobic Respiration
Oxygen RequirementRequired (O2)Not Required (Oxygen-Free)
EfficiencyMore EfficientLess Efficient
Energy Production (ATP)More ATP per glucose moleculeLess ATP per glucose molecule
Glucose BreakdownCompletely broken down to CO2 and H2OPartially broken down (various end products)
ExamplesAnimals, most plantsBacteria, yeast (fermentation), muscle cells (during intense exercise)

9. How are the alveoli designed to maximise the exchange of gases ?

Ans : Alveoli are like tiny air balloons in your lungs! They’re specially designed for super gas exchange:

  • Lots of Surface Area: More balloon space means more room for oxygen to move from air to blood.
  • Paper-Thin Walls: Shortens the distance oxygen needs to travel to reach your blood.
  • Capillary Crowd: A network of tiny blood vessels surrounds each alveoli, ready to grab that oxygen.
  • Moist Lining: Helps dissolve oxygen for even easier transfer.

This amazing design keeps your body constantly fueled with fresh oxygen!

10. What would be the consequences of a deficiency of haemoglobin in our bodies?

Ans : No hemoglobin, big problems! Here’s how low hemoglobin (anemia) affects you:

  • Oxygen Starvation: Not enough oxygen reaches your body tissues.
  • Feeling Weak and Breathless: You’re tired and struggle to catch your breath.
  • Pale Skin, Headaches, and More: You might look pale, have headaches, and have trouble focusing.

11. Describe double circulation in human beings. Why is it necessary ?

Ans : The human circulatory system has a unique feature called double circulation. This means blood travels through the heart twice in a complete circuit around the body. Here’s how it works:

The Two Loops:

  1. Pulmonary Circulation: This loop carries deoxygenated blood from the body to the lungs for oxygen pickup. The heart pumps deoxygenated blood from the right ventricle to the lungs, where it picks up oxygen and releases carbon dioxide. The oxygenated blood then returns to the left atrium of the heart.
  2. Systemic Circulation: This loop carries oxygenated blood from the heart to the rest of the body. The heart pumps oxygenated blood from the left ventricle to all the organs and tissues through arteries. These organs use the oxygen for various functions, and the blood becomes deoxygenated again. The deoxygenated blood then travels back to the right atrium of the heart through veins, completing the circuit.

Why Double Circulation Matters:

Double circulation is crucial for two main reasons:

  1. Separation of Oxygenated and Deoxygenated Blood: This separation ensures that oxygen-rich blood is delivered efficiently to all parts of the body. If the oxygenated and deoxygenated blood were mixed, the overall oxygen content would be much lower, impacting vital functions.
  2. High-Pressure System: Double circulation allows the left ventricle, which pumps blood to the entire body, to generate a higher pressure compared to a single circulation system. This ensures efficient delivery of oxygenated blood throughout the body, even to distant organs.

12. What are the differences between the transport of materials in xylem and phloem ?

Ans : 

FeatureXylem TransportPhloem Transport
FunctionTransports water and dissolved minerals upwardsTransports organic solutes (mainly sugars) throughout plant
DirectionUnidirectional (upward from roots to leaves)Bidirectional (source to sink, depending on needs)
ContentsWater, dissolved minerals (e.g., ions)Sugars (e.g., sucrose), amino acids, hormones
Active or Passive?Passive transport (driven by transpiration pull)Active transport (requires energy)
Cell TypeDead cells (tracheids & vessels)Living cells (sieve tube elements & companion cells)

13. Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.

Ans : 

FunctionAlveoliNephrons
Main JobGas exchangeWaste removal and fluid balance
StructureTiny air sacs with thin wallsMicroscopic filtering units with two main parts: glomerulus and tubules
ProcessOxygen from inhaled air diffuses into blood vessels surrounding the alveoli, while carbon dioxide diffuses from the blood into the air sacs to be exhaled.Blood enters the glomerulus, where pressure forces fluids and waste products out. The remaining fluid travels through tubules where essential nutrients and water are reabsorbed back into the blood, and waste products are excreted in urine.

NCERT Solutions for Class 10 Science Chapter 5 : Life Processes

FAQs

What are the main topics covered in NCERT Solutions for Class 10 Science Chapter 5?

NCERT Solutions for Class 10 Science Chapter 5 cover the key life processes including nutrition, respiration, transportation, and excretion in plants and animals.

How is nutrition explained in Class 10 Science Chapter 5?

Nutrition in Class 10 Science Chapter 5 is explained through the processes of autotrophic and heterotrophic nutrition. Autotrophic nutrition involves organisms like plants that make their own food through photosynthesis, while heterotrophic nutrition involves organisms that obtain food by consuming other organisms

What is the importance of respiration as per NCERT Solutions for Class 10 Science Chapter 5?

Respiration is crucial as it provides the energy needed for various life processes. NCERT Solutions for Class 10 Science Chapter 5 explain the types of respiration, aerobic and anaerobic, and the steps involved in the breakdown of glucose to release energy.

How is the transportation system in plants and animals described in Class 10 Science Chapter 5?

The transportation system in Class 10 Science Chapter 5 is described in terms of how nutrients, gases, and waste products are moved within organisms. In animals, it includes the circulatory system with the heart and blood vessels. In plants, it involves xylem and phloem tissues.

What are the key components of the excretory system according to NCERT Solutions for Class 10 Science Chapter 5?

Key components of the excretory system as explained in NCERT Solutions for Class 10 Science Chapter 5 include the kidneys, ureters, bladder, and urethra in humans.

How is the process of photosynthesis detailed in Class 10 Science Chapter 5?

Photosynthesis is detailed in Class 10 Science Chapter 5 as the process by which green plants synthesize food using sunlight, carbon dioxide, and water.

What is the role of enzymes in life processes as per NCERT Solutions for Class 10 Science Chapter 5?

Enzymes play a vital role in speeding up biochemical reactions in life processes. NCERT Solutions for Class 10 Science Chapter 5 explain how enzymes act as catalysts in digestion, respiration, and other metabolic activities, ensuring efficient functioning of the body.

How are the processes of digestion explained in Class 10 Science Chapter 5?

Digestion in Class 10 Science Chapter 5 is explained through the breakdown of food into simpler substances that can be absorbed by the body. The chapter details the digestive organs, the role of digestive enzymes, and the absorption process in the small intestine.

How does NCERT Solutions for Class 10 Science Chapter 5 explain human respiration?

Human respiration is explained in NCERT Solutions for Class 10 Science Chapter 5 by detailing the respiratory system, including the lungs, trachea, and diaphragm.

Where can I find detailed NCERT Solutions for Class 10 Science Chapter 5?

Detailed NCERT Solutions for Class 10 Science Chapter 5 can be found in the NCERT textbook for Class 10 Science or on various educational websites and platforms that provide free access to these solutions.

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