Communication in animals by using their senses

Animal senses: in this chapter we are going to learn about how animal communicate through the use of their senses such as sight, touch, smell etc

1. Chapter -5 Animal Senses

2. Communication is how we share our thoughts, feelings, and information with others. Introduction

3. Animals cannot talk or communicate with each other like we do. They communicate through a wide range of methods, using various sensory signals and behaviours to convey information to each other. Communication serves several purposes for animals, including mating, establishing territories, alerting others to danger, coordinating group activities and maintaining social bonds. How animals communicate?

4. Communication by Sight Communication by Sound Communication by Smell Communication by Touch Electric communication Some common ways how animals communicate:-

5. Echolocation in bats and dolphins. Electroreception in sharks and electric fish. Magnetic field detection. Infrared sensing in snakes. Compound eyes in insects. Taste sensing through feet in butterflies. Pressure sensing in aquatic animals. Sensitive whiskers. Camouflage. Long sleep. Senses And Unusual Features Of Animals:-

6. 1. Sensory 2. Impending 3. Obstacles 4. Sniff 5. Hierarchies 6. Echolocation 7. Electroreception 8. Infrared radiation 9. Vertebrates 10. Receptors 11. Lateral 12.Aestivation A. New terms :-

7. 1. Sensory- how we experience and perceive the world around us through senses. 2. Impending- forthcoming. 3. Hierarchies- organised systems where things or people are ranked or put in order based on their importance or authority. B. Word meaning :-

8. 4. Vertebrates – animals that have a backbone or spine inside their bodies. 5. Receptor – a specialised part of our body that can sense or detect specific things like light, temperature or chemicals. 6. Lateral – to the side or situated on the side of something.

9. Q1. What is the need of communication in animals? Ans. Communication serves several purposes for animals including mating, establishing territories, alerting others to danger, coordinating group activities and maintaining social bonds. Q2. Explain communication by electricity. Ans. Some animals, such as electric fish, generate electrical signals that can be used for communication. Electric fish use these signals to detect and communicate with other fish, helping establish social hierarchies and locate prey. These signals can also warn of danger or attract mates. C. Short answer type questions :-

10. Q3. What is aestivation? Ans. Some animals undergo long sleeping patterns in summers to avoid the extreme heat. This summer sleep is called aestivation . Q4. What is hibernation? Ans. Some animals like lizards, frogs and bears sleep through the long winter months to avoid the lack of food and extreme temperatures. This is called hibernation .

11. Q1. Explain echolocation. Ans. Echolocation is a technique used by animals, such as bats and dolphins to determine the location of objects using the reflection of sound waves. Q2. Discuss pressure sensing in aquatic animals. Ans. Aquatic animals like fish have specialised sensory organs called lateral lines that run along their bodies. These organs can detect changes in water pressure, vibrations and currents, helping fish detect nearby objects and navigate through their underwater environments. Long answer type questions :-

12. Q3. Write a short note on camouflage. Ans. Camouflage is a defence mechanism that organisms use to disguise their appearance, usually to blend in with their surroundings. Example : The chameleon can change its colours to match the surroundings to hide from its enemies.

13. 1. OUFCAMAGEL- CAMOUFLAGE 2. ACOLCHOEIONT - ECHOLOCATION 3. SREKSIHW - WHISKERS 4. ERTEVETABR - VERTEBRATE 5. EASTVAIONTI - AESTIVATION Unscramble the jumbled letters :-