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 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. They are present on either side of the fish head. Reason (R): The streamlined body helps fishes move faster in the water. By streamlining the body, marine mammals are able to reduce the resistive drag. 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. This frictional force is known as drag. Categories: Aerodynamics. 10. Acacia (b) Xerophyte: 5. Their gills help them to breathe in water. By streamlining the body, marine mammals are able to reduce the resistive drag. 4.21 A). Show Answer Workspace This common characteristic most likely is the result of: Thousands of Japanese fishermen have used gill nets . Bonytail. (2) The fish has special organs called "gills" which-help it to absorb oxygen-dissolved in water for breathing. Eyes In general, deep-water fishes have large eyes, allowing them to absorb as much light as possible in the dark. Latest NCERT & CBSE News. Laterally Compressed (flattened from side to side) A is true, but R is false. These goldfish are slender with a longer body. (ii) Fishes cannot survive outside water because fishes have gills which help them to use the oxygen dissolved in water. The streamlined body of the fish. A streamlined body is a shape of body that reduces resistance when moving. Auks are well-adapted to underwater swimming. View synonyms. 1 Having a form that presents very little resistance to a flow of air or water. 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. The slim ones have this shape that is referred to as streamlined body type. If you have any other queries of . A streamlined body is basically an adaptation that helps aquatic animals to survive in the aquatic habitat. Others. Ribs (c) can fly in the air: 4. 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. Answer Incorrect. 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. 'streamlined passenger trains'. Langerhans said the body shape changes likely help make it better able to handle changing water conditions. Aeroplane, ship, and boat also have streamlined shapes to reduce resistance to the flow of air and water. They stretch the muscles on one side and relax the muscles on the other side. A fish can live in water only because it is adapted to breathe in water. 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 A is false, but R is true. Thus, a fish swims with the help of streamlined body and the fins. Cockroach (e) protect the heart (f) have a streamlined body (g) shows very slow movement You can learn more about streamlines here! Examples: Fishes have streamlined body so that they have less resistance when swimming in water. Locomotion in fishes and snakes — lesson. Gills are unable to absorb atmospheric oxygen, due to which the fish will die when removed out of water. D. Making the whale float in water. Machine parts - Shafts of motors 7. Fluids exerts a force opposite to the direction of motion when an object (Fish) is moving in a fluid. This same idea works with airplanes! Streamlined shark. What are the advantages of a streamlined body? 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. Locomotion in fishes and snakes. Gills are special respiratory organs that absorb oxygen dissolved in water for respiration. The streamlined body of the fish helps in movement in water. 5. You can learn more about streamlines here! Breathing C. Breeding D. Feeding. As a result, people often use the words perch-like to describe a generic fish shape. The bodies of fish are the streamlined bodies because they have to move in fluids. The shape of the body is said to be streamlined, if the body tapers at both the ends. They have compact, streamlined bodies, short wings, and very short tails. 3. As per the meaning of "streamlined", their shape presents very little resistance to the flow of water, very much like a flat bodied torpedo. Treamlined bodies often have a teardrop shape. . A: Streamlining your body reduces the friction of movement to a minimum thus decreasing overall drag. More example sentences. 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. Fishes are vertebrates with an endoskeleton made up of cartilage or bones. Science CBSE, Class 6. (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. Fish with small scales (e.g. Many fishes have a streamlined body and swim freely in open water. This motion helps them to move forward (swim). 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. 2 Having been made simpler and more efficient or effective. Perches are the most common type of bony fishes. A: A streamlined body is a shape of body that reduces resistance when moving. Its name describes the fish as an elegant swimmer and member of the "chub" group of minnows. Sand - Snow on roads. Tail 1. Species of Streamline-Bodied Goldfish. Body Shape. earthworm. Gills helps the fishes to adapt to breathe or respire in water. Tyres - Grooves for grip Explanation: hope it helps u! Learn vocabulary, terms, and more with flashcards, games, and other study tools. 4.5 (14) (42) (12) Choose An Option That Best Describes Your Problem. For a bluff body, the dominant source of drag is pressure drag. Let's call them the slim ones and the rounded ones. The thick layer of fat under the skin of a whale is for A. 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. 15) Assertion (A): A fish has a streamlined body. 'the fish has a sleek streamlined body'. Fish (b) has an outer skeleton: 3. It has large fins and a streamlined body that is pencil-thin near its tail. A fusiform shape is the principle morphology to reduce drag and modify the water flow over the body and appendages. Answer not in Detail. Blowholes (e) Whales: 4. A fusiform shape is the principle morphology to reduce drag and modify the water flow over the body and appendages. (Fig. Moving B. Dolphins and sharks both have a streamlined body shape with a triangular fin on the back and two side fins. Answer: The body of the fish is streamlined. Drag is the force that reduces the speed of the motion. Depressiform. More example sentences. Streamlined body- Fish 2. The streamlined bodies seen in sharks, tuna, and dolphins is most likely due to. (i) The streamlined body shape (boat shape) allows the fish to move easily in water. 1) The slim ones. Birds have a streamlined body to make their flight easier through the air. Hybodus looked as fierce as any modern shark. Many animals, such as birds and dolphins, and many . There are only 2 body types of goldfish breeds. Often such fishes are long and slender, able to dart at . Goldfish effectively fit into just two broad categories of body type, most commonly described as 'egg-shaped' or 'streamlined' or 'slim-bodied'. Streamlined and tapered at each end. 2) Submarines have streamlined shapes to reduce the friction force exerted by the water. (i) The streamlined body shape (boat shape) allows the fish to move easily in water. tuna) are more streamlined and fast swimmers to catch their prey, whereas fish with large scales are typically slow swimmers in comparison. Breathing C. Breeding D. Feeding. Incomplete Answer. 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. (ii) Fishes cannot survive outside water because fishes have gills which help them to use the oxygen dissolved in water. Drag is a force that slows down motion; friction drag is a special kind of drag. For fishes having a streamlined body that is smooth helps save energy it would otherwise have to expend swimming. AJ with an early morning Illinois muskie - shot out of the depths like a rocket to attack a black bucktail with bright green blades. Answer not in Detail. 'streamlined passenger trains'. Get premium membership and access revision papers with marking schemes, video lessons and live classes. The streamlined body is found in a -----Multiple choice question. Making the whale heavier C. Keeping the body of the whale warm. Birds have a streamlined body to make their flight easier through air. The streamlined shape helps the fish to move in water. Flattened shape that allows fish to rest on the bottom using camouflage to hide (Flounder, halibut, rays, skates) Taeniform. Gills are unable to absorb atmospheric oxygen, due to which the fish will die when removed out of water. It occurs when the fluid closest to the object sticks to its surface, exerting a force that opposes the object's motion. The streamlined body is found in a -----fish. Fish Body Shapes The shape of a fish's body tells alot about its lifestyle. 2. Most fish have a streamlined body - the head and the tail are narrow; the middle portion of the body is broader. Snakes have a streamlined body to assist them move forward. 1 Having a form that presents very little resistance to a flow of air or water. This kind of shape offers least resistance to the flow of water and makes it easier for them to swim through water. Snail (d) is an immovable joint: 5. In order to decrease this drag the objects are given a special shape or streamlined shape. The streamlined body shape helps the fish to move through the water easily (because such a shape offers least resistance to motion). 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. Both A and R are false. A streamlined body is a body shape that reduces resistance during movement. A bonito is a group of eight distinctive fish species, including the Atlantic bonito and Pacific bonito, in the mackerel/tuna family. 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. View synonyms. Assimilating this body characteristic to its fast-swimming behavior helps to remember which body-shape of fish is fast and which is slow. Walking - Friction between ground and feet. A Streamlining your body reduces the friction of movement to a minimum thus decreasing overall drag. 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 . jellyfish. Look at the body shapes of the fish shown below. Start studying Fish Body Shapes. Which one is best adapted to live in open water in the epipelagic zone, and why? 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. aerodynamic. 915 Points. Common; Comet; Shubunkin; Wakin; Features of Streamline-Bodied Goldfish Body. In order to decrease this drag the objects are given a special shape or streamlined shape. one year ago. 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. 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. 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. The bill is variable in shape and may be highly ornamented in the breeding season. The best way to show the difference is to show a comparison of both body types side-by-side: Streamlined body (c) Fish: 3. The slippery scales/skin on the body of fish protect their body. Example 1) Aeroplanes have streamlined shapes to reduce the friction force exerted by the air. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in . Some animals, such as sharks and dolphins, are streamlined so that they have less resistance when swimming in water. Puffer fish) don't depend on speed so they don't have streamlined body shape. The shape of the body is said to be streamlined if the body tapers at both ends. Ball bearings - Shafts of motors 3. The tuna's sleek and streamlined torpedo-shaped body makes it one of the fastest fish in the world and a capable predator. Fishes swim by flexing their streamlined bodies and tail back and forth. Was this answer helpful? Posted on January 8, 2018 at 1:52 pm. Keeping the skin of the whale oily B. Static friction - opposes motion. Moving B. 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. Some animals, such as sharks and dolphins, are streamlined so that they have less resistance when swimming in water. Home Browse. This makes a jerk and pushes the body forward. For streamlined bodies, frictional drag is the dominant source of air resistance. 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 Question 5. The feet are placed far back on the body, webbed, with no hind toe; claws are narrow and the tarsus is laterally compressed. 'this streamlined approach will significantly reduce the . A body is said to be streamlined when it is tapering at both ends. 'the fish has a sleek streamlined body'. Body Form. adjective. The fishes use their caudal fin (back fin) to push themselves through the water. Fish locomotion is closely correlated with habitat and ecological niche (the general position of the animal to its environment). The aeroplanes and ships have streamlined shaped bodies to reduce drag. 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. Lorna Roberts/Shutterstock.com #5 Fastest Fish: Bonito. Examples: Fishes have streamlined bodies so that they have less resistance when swimming in water. (3m 34s) 230 Views SHARE | Tutorke.com Mobile App About Us Contact Us 6. Other fish that depends on speed to catch fish or running away from predator have streamlined body shape so that they . For fishes having a streamlined body that is smooth helps save energy it would otherwise have to expend swimming. The fishes have a streamlined body where the head and tail are small when compared to the mid-portion of the body. Treamlined bodies often have a teardrop shape. Fishes have streamlined body so that it can reduce friction in water and thus helping the fishes to move easily. Fluid friction is a type of force which resist motion within a fluid. The anus usually marks the posterior termination of the body cavity and most often occurs just in front of the . The forward propulsion of a streamlined fish is produced via lateral body thrusts supplemented by caudal, dorsal and anal fins. For fishes having a streamlined body that is smooth helps save energy it would otherwise have to expend swimming. "Flatter" body types provide good propulsion, but also aid in maneuvering in cover. Read the latest news and announcements from NCERT and CBSE below. Incomplete Answer. Both A and R are true, but R is not the correct explanation of A. The gills are present in a gill chamber and are covered by a flap called an operculum . Fusiform is the scientific term used to describe the perch's streamlined, torpedo shaped body. aerodynamic. Both A and R are true, and R is the correct explanation of A. Their shape is similar to a torpedo. Class 8 Science: Adaptation of Animals Questions and Answers The streamlined body of a fish is useful to it when it is A. They have flat fins and tails which help them to swim, change direction and to keep the body balance. 4. One of their defining traits is . 3) Body of the fish naturally has a streamlined shape. This shape of the body is known as streamlined. (a) have fins on the body: 2. The streamlined body of a fish is useful to it when it is A. Dolphins have many traits in common with fish, such as a streamlined body and fins, however dolphins are mammals. 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. snail. 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