Birds have a streamlined body to make their flight easier through air. The bodies of fish are the streamlined bodies because they have to move in fluids. Streamlined shapes can be approximated by measuring the Fineness Ratio (body length/maximum body width), which is optimal between 3 and 7 to reduce drag. Categories: Aerodynamics. (ii) Fishes cannot survive outside water because fishes have gills which help them to use the oxygen dissolved in water. Walking - Friction between ground and feet. The typical fish body is streamlined and spindle-shaped, with an anterior head, a gill apparatus, and a heart, the latter lying in the midline just below the gill chamber.The body cavity, containing the vital organs, is situated behind the head in the lower anterior part of the body. Perches are the most common type of bony fishes. body is streamlined it reduces the fluid friction that offers obstruction in body's path of motion air, water or such substances get cut into from the edge that the body has thus distributing the. For fishes having a streamlined body that is smooth helps save energy it would otherwise have to expend swimming. One of their defining traits is . Langerhans said the body shape changes likely help make it better able to handle changing water conditions. A Streamlining your body reduces the friction of movement to a minimum thus decreasing overall drag. In order to decrease this drag the objects are given a special shape or streamlined shape. View synonyms. Explain why the appearance of these similar traits occurred using the terms homology and homoplasy, 12 ; Question: Dolphins have many traits in common with fish, such as a streamlined body and fins, however dolphins are mammals . Fish (b) has an outer skeleton: 3. The shape of the body is said to be streamlined if the body tapers at both ends. Tail Most fish have a streamlined body - the head and the tail are narrow; the middle portion of the body is broader. Which one is best adapted to live in open water in the epipelagic zone, and why? Making the whale heavier C. Keeping the body of the whale warm. Snakes have a streamlined body to assist them move forward. Examples: Fishes have streamlined bodies so that they have less resistance when swimming in water. Their gills help them to breathe in water. (i) The streamlined body shape (boat shape) allows the fish to move easily in water. (a) have fins on the body: 2. Locomotion in fishes and snakes — lesson. 10. 'streamlined passenger trains'. This common characteristic most likely is the result of: Thousands of Japanese fishermen have used gill nets . Locomotion in fishes and snakes. Fishes swim by flexing their streamlined bodies and tail back and forth. Drag is the force that reduces the speed of the motion. What is the importance of streamlined body of a fish 2 See answers Advertisement Advertisement Brainly User Brainly User Answer: Streamlining your body reduces the friction of movement to a minimum thus decreasing overall drag. 1. What are the advantages of a streamlined body? Answer not in Detail. 4. For streamlined bodies, frictional drag is the dominant source of air resistance. aerodynamic. This frictional force is known as drag. one year ago. Was this answer helpful? Static friction - opposes motion. Fluids exerts a force opposite to the direction of motion when an object (Fish) is moving in a fluid. Gills are special respiratory organs that absorb oxygen dissolved in water for respiration. Bonytail. A body is said to be streamlined when it is tapering at both ends. Fluid friction is a type of force which resist motion within a fluid. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in . The streamlined body of a fish is useful to it when it is A. Incomplete Answer. A streamlined body is basically an adaptation that helps aquatic animals to survive in the aquatic habitat. A streamlined body is a shape of body that reduces resistance when moving. aerodynamic. 1 Having a form that presents very little resistance to a flow of air or water. It is a form that aids in the reduction of friction between a fluid and an object moving through it and it also decreases resistance to movement. Body Form. The streamlined body of the fish helps in movement in water. In comparing the streamlined nature of a dolphin and that of a shark, you conclude that the streamline feature evolved independently in sharks and dolphins. They stretch the muscles on one side and relax the muscles on the other side. As per the meaning of "streamlined", their shape presents very little resistance to the flow of water, very much like a flat bodied torpedo. Lorna Roberts/Shutterstock.com #5 Fastest Fish: Bonito. You can learn more about streamlines here! Streamlined shark. Show Answer Workspace A bonito is a group of eight distinctive fish species, including the Atlantic bonito and Pacific bonito, in the mackerel/tuna family. A fusiform shape is the principle morphology to reduce drag and modify the water flow over the body and appendages. Gills are unable to absorb atmospheric oxygen, due to which the fish will die when removed out of water. Fish with small scales (e.g. 11. Answer: (2) A streamlined body is a shape that decreases the friction drag between a fluid, such as air and water, and an object that passes through that fluid. Gills are unable to absorb atmospheric oxygen, due to which the fish will die when removed out of water. Birds have a streamlined body to make their flight easier through the air. More example sentences. Fishes are vertebrates with an endoskeleton made up of cartilage or bones. 5. This shape of the body is known as streamlined. Often such fishes are long and slender, able to dart at . Start studying Fish Body Shapes. For fishes having a streamlined body that is smooth helps save energy it would otherwise have to expend swimming. 2 Having been made simpler and more efficient or effective. 3. (3m 34s) 230 Views SHARE | Tutorke.com Mobile App About Us Contact Us By streamlining the body, marine mammals are able to reduce the resistive drag. The thick layer of fat under the skin of a whale is for A. Treamlined bodies often have a teardrop shape. Moving B. (ii) Fishes cannot survive outside water because fishes have gills which help them to use the oxygen dissolved in water. The streamlined body is found in a -----Multiple choice question. Fishes have streamlined body so that it can reduce friction in water and thus helping the fishes to move easily. Eyes In general, deep-water fishes have large eyes, allowing them to absorb as much light as possible in the dark. Depressiform. Thus, a fish swims with the help of streamlined body and the fins. D. Making the whale float in water. Class 8 Science: Adaptation of Animals Questions and Answers The streamlined body of a fish is useful to it when it is A. adjective. Goldfish effectively fit into just two broad categories of body type, most commonly described as 'egg-shaped' or 'streamlined' or 'slim-bodied'. Buoyancy in a bony fish is maintained with the help of (1) streamlined body (2) paired fins (3) swim bladder (4) all the above Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level The tuna's sleek and streamlined torpedo-shaped body makes it one of the fastest fish in the world and a capable predator. Gills helps the fishes to adapt to breathe or respire in water. Breathing C. Breeding D. Feeding. Streamlined shapes can be approximated by measuring the Fineness Ratio (body length/maximum body width), which is optimal between 3 and 7 to reduce drag. Tyres - Grooves for grip Explanation: hope it helps u! Sand - Snow on roads. snail. Their shape is similar to a torpedo. If you have any other queries of . The slippery scales/skin on the body of fish protect their body. This same idea works with airplanes! 3) Body of the fish naturally has a streamlined shape. More example sentences. Streamlined body (c) Fish: 3. Answer: The body of the fish is streamlined. There are only 2 body types of goldfish breeds. A: A streamlined body is a shape of body that reduces resistance when moving. Body Shape. Learn vocabulary, terms, and more with flashcards, games, and other study tools. 'this streamlined approach will significantly reduce the . Cockroach (e) protect the heart (f) have a streamlined body (g) shows very slow movement Home Browse. Both A and R are true, and R is the correct explanation of A. Species of Streamline-Bodied Goldfish. (i) The streamlined body shape (boat shape) allows the fish to move easily in water. As a result, people often use the words perch-like to describe a generic fish shape. This kind of shape offers least resistance to the flow of water and makes it easier for them to swim through water. The gills are present in a gill chamber and are covered by a flap called an operculum . A fish can live in water only because it is adapted to breathe in water. (Fig. Common; Comet; Shubunkin; Wakin; Features of Streamline-Bodied Goldfish Body. Fish locomotion is closely correlated with habitat and ecological niche (the general position of the animal to its environment). Let's call them the slim ones and the rounded ones. The skeleton of the fish is covered with muscles that make the front part of the body to curve to one side and the tail part swings towards the opposite side. These goldfish are slender with a longer body. 915 Points. Others. Streamlined body- Fish 2. A streamlined body is a shape that lowers the friction drag between a fluid, like air and water, and an object moving through that fluid. AJ with an early morning Illinois muskie - shot out of the depths like a rocket to attack a black bucktail with bright green blades. 6. Many animals, such as birds and dolphins, and many . The streamlined body is found in a -----fish. Other fish that depends on speed to catch fish or running away from predator have streamlined body shape so that they . Both A and R are true, but R is not the correct explanation of A. Many fishes in both marine and fresh waters swim at the surface and have mouths adapted to feed best (and sometimes only) at the surface. They have compact, streamlined bodies, short wings, and very short tails. Get premium membership and access revision papers with marking schemes, video lessons and live classes. A is true, but R is false. It had the classic streamlined shape, but its teeth and fins were different from today's sharks. The anus usually marks the posterior termination of the body cavity and most often occurs just in front of the . Many fishes have a streamlined body and swim freely in open water. It occurs when the fluid closest to the object sticks to its surface, exerting a force that opposes the object's motion. It has large fins and a streamlined body that is pencil-thin near its tail. tuna) are more streamlined and fast swimmers to catch their prey, whereas fish with large scales are typically slow swimmers in comparison. Reason (R): The streamlined body helps fishes move faster in the water. The feet are placed far back on the body, webbed, with no hind toe; claws are narrow and the tarsus is laterally compressed. For a bluff body, the dominant source of drag is pressure drag. Water lettuce (a) Floating plant: Hope the information shed above regarding NCERT MCQ Questions for Class 6 Science Chapter 9 The Living Organisms and Their Surroundings with Answers Pdf free download has been useful to an extent. Snail (d) is an immovable joint: 5. . Blowholes (e) Whales: 4. Dolphins and sharks both have a streamlined body shape with a triangular fin on the back and two side fins. jellyfish. This motion helps them to move forward (swim). However, the two animals also have many differences. earthworm. 1 Having a form that presents very little resistance to a flow of air or water. The slim ones have this shape that is referred to as streamlined body type. 2) Submarines have streamlined shapes to reduce the friction force exerted by the water. A is false, but R is true. View synonyms. They are present on either side of the fish head. A fusiform shape is the principle morphology to reduce drag and modify the water flow over the body and appendages. You can learn more about streamlines here! The best way to show the difference is to show a comparison of both body types side-by-side: 15) Assertion (A): A fish has a streamlined body. 4.5 (14) (42) (12) Choose An Option That Best Describes Your Problem. Treamlined bodies often have a teardrop shape. The streamlined body of the fish. Laterally Compressed (flattened from side to side) Acacia (b) Xerophyte: 5. A: Streamlining your body reduces the friction of movement to a minimum thus decreasing overall drag. Question 5. Animals such as tuna fish, shark, and dolphins have streamlined body so as to reduce resistance in water when swimming or reduce what we call fluid friction. Some animals, such as sharks and dolphins, are streamlined so that they have less resistance when swimming in water. Fusiform (streamlined) Fish with fusiform bodies are fast swimming predators that swim at high speeds much of the time or with great bursts of speed. (Gila elegans) The bonytail is the rarest of the endangered, native fish of the Colorado River and is thought to have evolved around 3-5 million years ago. Hybodus looked as fierce as any modern shark. Streamlined and tapered at each end. In order to decrease this drag the objects are given a special shape or streamlined shape. The shape of the body is said to be streamlined, if the body tapers at both the ends. 1) The slim ones. Some animals, such as sharks and dolphins, are streamlined so that they have less resistance when swimming in water. A streamlined body is a body shape that reduces resistance during movement. The fishes have a streamlined body where the head and tail are small when compared to the mid-portion of the body. Flattened shape that allows fish to rest on the bottom using camouflage to hide (Flounder, halibut, rays, skates) Taeniform. In the field, one species of fish, a type of minnow called western blacknose dace (Rhinichthys obtusus), reflected predicted changes: its body shape became more streamlined in urbanized areas. Machine parts - Shafts of motors 7. Auks are well-adapted to underwater swimming. The fishes use their caudal fin (back fin) to push themselves through the water. The streamlined bodies seen in sharks, tuna, and dolphins is most likely due to. 'the fish has a sleek streamlined body'. Ribs (c) can fly in the air: 4. Breathing C. Breeding D. Feeding. Some have flat bodies and sucker-style mouths ideal for resisting strong currents and moving along rocks, feeding on algae -- such as the common plec -- while others have streamlined forms adapted to quick, constant movement and upturned mouths to suck insects from the water's surface, like the zebra danio. Read the latest news and announcements from NCERT and CBSE below. Sharks Dolphins skeleton made of cartilage skeleton made of bone use gills to get oxygen from the water in which they swim go to the surface and Fusiform is the scientific term used to describe the perch's streamlined, torpedo shaped body. The aeroplanes and ships have streamlined shaped bodies to reduce drag. A streamlined body looks like a fish, or an airfoil at small angles of attack, whereas a bluff body looks like a brick, a cylinder, or an airfoil at large angles of attack. Ball bearings - Shafts of motors 3. Latest NCERT & CBSE News. Drag is a force that slows down motion; friction drag is a special kind of drag. Fish A because of its streamlined body and powerful tail Fish B because of its flattened shape and eyes on the dorsal side Fish C because of its elongated shape and lack of pectoral fins 4.21 A). 'the fish has a sleek streamlined body'. 2. The streamlined shape helps the fish to move in water. The streamlined body shape helps the fish to move through the water easily (because such a shape offers least resistance to motion). Examples: Fishes have streamlined body so that they have less resistance when swimming in water. (2) The fish has special organs called "gills" which-help it to absorb oxygen-dissolved in water for breathing. For fishes having a streamlined body that is smooth helps save energy it would otherwise have to expend swimming. Moving B. Puffer fish) don't depend on speed so they don't have streamlined body shape. Look at the body shapes of the fish shown below. Answer Incorrect. Science CBSE, Class 6. The bill is variable in shape and may be highly ornamented in the breeding season. Its name describes the fish as an elegant swimmer and member of the "chub" group of minnows. The forward propulsion of a streamlined fish is produced via lateral body thrusts supplemented by caudal, dorsal and anal fins. Fish Body Shapes The shape of a fish's body tells alot about its lifestyle. Answer not in Detail. They have flat fins and tails which help them to swim, change direction and to keep the body balance. Assimilating this body characteristic to its fast-swimming behavior helps to remember which body-shape of fish is fast and which is slow. Dolphins have many traits in common with fish, such as a streamlined body and fins, however dolphins are mammals. "Flatter" body types provide good propulsion, but also aid in maneuvering in cover. Friction produced by fluids are known as drag.Water produces drag.As fish is an aquatic animal,it should overcome drag.Streamlining is one ofd the better methods that reduces friction.A streamlined body is sharp at the front and rounded at the back.Thus the streamlined body of a fish helps the fish to reduce the drag and to move easily and faster through water. Both A and R are false. 'streamlined passenger trains'. Example 1) Aeroplanes have streamlined shapes to reduce the friction force exerted by the air. By streamlining the body, marine mammals are able to reduce the resistive drag. Keeping the skin of the whale oily B. Posted on January 8, 2018 at 1:52 pm. This makes a jerk and pushes the body forward. Friction produced by fluids are known as drag.Water produces drag.As fish is an aquatic animal,it should overcome drag.Streamlining is one ofd the better methods that reduces friction.A streamlined body is sharp at the front and rounded at the back.Thus the streamlined body of a fish helps the fish to reduce the drag and to move easily and faster through water. It had two types of tooth, sharp ones at the front for seizing slippery prey such as fish, and flatter, more blunt teeth at the back of the mouth for crushing shells. Aeroplane, ship, and boat also have streamlined shapes to reduce resistance to the flow of air and water. Incomplete Answer. Maneuvering in cover changing water conditions ) Taeniform Friction-Science-Class-8 < /a > shape... 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