Q. Fishes have a streamlined body shape that helps them to move inside water.
What are the three features of the fish that help them to swim in water?
- Fish have a streamlined body shape, flexible backbone, fins and strong muscles which help them to swim in water.
- Their body shape is such that water flows easily around it allowing the fish to smoothly move in water.
Why do fish has boat shape?
(i) The streamlined body shape (boat shape) allows the fish to move easily in water .
What is the shape of a fish How does it help it to move?
The body of fish is streamlined. The streamlined shape helps the fish to move in the water . The skeleton of fish is covered with muscles which make the front part of the body to curve to one side and the tail part swings towards the opposite side. This makes a jerk and pushes the body forward.
Why fish can swim easily in water?
Fishes can easily swim in water because they have streamlined bodies, which produces minimum friction in water and energy required to overcome this friction is very less .
What shape moves faster in water?
This is called a streamlined shape . A streamlined shape moves faster through water than other shapes. This is because it can cut through the water more efficiently than other shapes.
What is the shape that fish birds airplanes and ships have that reduce air water resistance?
The fish, birds, airplanes and ships have a streamlined body shape – rounded in front and narrow at the back. This reduces the air / water resistance.
What is the shape of aquatic animals How does it help aquatic animals?
Aquatic animals tend to have tubular shaped bodies ( fusiform shape) that decrease drag, enabling them to swim at high speeds .
What are the features of fish to live in water?
(i) The shape of the fish is streamlined which helps in the movement. (ii) The slippery scales/skin on their bodies to protect them. (iii) They have flat fins and tails which help them to swim, change direction, and to keep the body balanced. (iv) They have gills that help in breathing in water.
Which of the special structures of fishes make them live in water?
Adaptations for Water
Fish have gills that allow them to “breathe” oxygen in water. Water enters the mouth, passes over the gills, and exits the body through a special opening. Gills absorb oxygen from the water as it passes over them.
What are the adaptation of fish to live in water?
Fish have adapted to their environment through the evolution of gills, swim bladders and fins . Gills allow fish to absorb oxygen from the water, swim bladders allow fish to maintain an appropriate level of buoyancy and fins allow the fish to move through the water.
Do fish make shapes?
Fish schools swim in disciplined phalanxes, with some species, such as herrings, able to stream up and down at impressive speeds, twisting this way and that, and making startling changes in the shape of the school, without collisions. It is as if their motions are choreographed, though they are not.
What is a shape of fish?
Bony fishes show great variety in body shape, but the “typical” fish body shape is roughly cylindrical and tapering at both ends . This characteristic fusiform shape is quite energy efficient for swimming. Other fishes have a more streamlined shape.
What is the shape of a fish called?
Answer. The body is often fusiform, a streamlined body plan often found in fast-moving fish. They may also be filiform (eel-shaped) or vermiform (worm-shaped) . Fish are often either compressed (laterally thin) or depressed (dorso-ventrally flat).
How can fishes flow around easily in the water Brainly?
General Science
Fishes can flow around easily- (b) due to streamlined body . Fishes are adapted to swim underwater. Their body has some special features that provide the least resistance to the flow of water. They have a streamlined body that helps to reduce the friction between water and their body surface.
How does a fish move up and down in water?
Most fish rise and sink in the water the same way a helium-filled balloon or a hot air balloon rises and sinks in the air . Buoyancy is caused by a difference in fluid pressure at different levels in the fluid. Particles at the lower levels are pushed down by the weight of all the particles above them.
How can fishes flow around easily in the water Mcq?
The head and tail of the fish are smaller than the middle portion of the body i.e., the body tapers at both ends. This body shape is called streamlined. Streamlined body shape minimises the resistance of water and allows water to flow around it easily thus helping the fish to easily swim in water.
How does the shape of the fish helps it to swim in water class 8?
The streamlined body of the fish helps it to overcome the frictional force offered by the water , thus helping it to swim easily........
How do fish mate?
In most cases, the female drops eggs in the water which are immediately fertilized by sperm from the male . Another way is for fertilization to occur within the females body before she drops them into the water. With the third and final method, the female retains the eggs within her body and the young are born alive.
What do fish have instead of legs?
A fish flaps its tail to swim through water. Instead of legs, they have fins to help them stay upright and steer.
How do fish reduce drag?
Fish can secrete mucus or slime over the body to reduce frictional drag. The slime is a combination of lipids and proteins, many of which contain long chains of molecules, and some of which can act as surfactants (lowering the surface tension of a fluid).
What makes fish fast?
In the characteristic undulatory swimming motion of fish, muscles contract sequentially along the body to generate a backward-moving wave of body bending . This pushes against the water and produces thrust.
Why do birds and fish have special shapes?
Physical Science
Ans: Birds have streamlined body so as to reduce the air resistance during flying . Whereas fishes have streamlined body so as to reduce friction in water and help them to move faster.
What is the similarity in the shape of the body of birds and fish?
Answer: Yes the body of fishes and birds are shaped in a special way. And this shape is called streamlined shape . It helps both fish as well as birds to move easily in water,air.
Why ships and boats are streamlined shape?
Streamlined shapes experience minimum drag (fluid friction) while travelling through air and water . Hence, boat and ships are given streamlined shape.
