Science [1 Marks Each] M.C.Q.

Cockroaches.

Skull.

Both the above.

Bone marrow.

Cartilage.

Snail moves with the help of a large, disc-shaped muscular foot.
The whole body of a snail is soft and consists of a head, a foot and a shell. Shell is the outer structure (skeleton) of snail, but it is not made of bones.

Skull.

A snail moves with the help of muscular foot.

Both have streamlined body.

In a pivotal joint a cylindrical bone rotates in a ring.

Back bone is made up of many small bones.

The earthworm, actually, eats its way through the soil. The body then throws the undigested part of the material that it eats. In this way, the earthworm makes the soil more useful for plants.

Pinnae of ears.

Cartilage.

All the above.

Hinge, pivotal, ball and socket, fixed.

Upper jaw and skull joints are immovable or fixed. Bones are held, so tightly together that they cannot move at all. The other options are:
Shoulder and arm Ball and socket joint.
Knee and joint Hinge joint.
Lower jaw and upper jaw Hinge joint.

The bones in elbow have hinge joint that allows only back and forth movement.

 Rib cage protects our lungs, heart and wind pipe.

Tissues.

By alternate contraction and relaxation of two sets of muscles.

Sternum.

Our muscles along with other body systems such as nervous system and circulatory system work together to move our bones.

All of the above.

Pivotal joint.

The streamlined body, fins and tail help a fish to move in water.

Ball and socket joint.

Bone is hard and firm whereas cartilage is soft and can be bent or can bend.

Snail does not have both muscles and skeleton for movement. The shell (i.e. external skeleton) serves for muscles attachment and protection. The movement is carried out only with the help of large disc-shaped muscular foot that has two sets of muscles.
In earthworm, a hydrostatic skeleton (fluid filled cavity surrounded by muscles) is present. The alternate contraction and relaxation of muscles and pressure of the fluid helps in burrowing.
Dog and human beings have musculoskeletal system for movement.

Forming loops alternately on two sides of the body.

Muscles.

Cartilages are found in joints. There are no bones in earthworm. The earthworm moves by alternate extension and contraction of body using muscles (not bristles).

Muscular foot.

Cockroaches have an outer skeleton.

 Shell is not made of bones.

All the above.

Kidneys.

Make the front part of its body curve to one side and tail part to the opposite site.

A muscle can only pull and not push. It is because of this that we need a pair of muscles to move a bone. The bones are moved by alternate contractions and relaxation of two sets of muscles.

Ball and socket joint.

Skeletal system provides attachment points for muscles.

All of these

Both the above.

Scales, streamlined bodies and fins help a fish to swim in the water.

Both bones and cartilage.

Flippers help in easy crawling and making loops.

Shoulder joint is of ball and stick type where as others are hinge joints.

Enclose the portion of our body that is below the stomach.

Tissue.

Pelvic joint is present in the hip region.

Wings, hollow bones and feathers help a bird to fly.

Kidney.

Hinge joint functions as the given figure.

Bristles.

Skeletal and muscular system allow a human arm to bend and move.

There are seven bones in the wrist.

Ear and nose retain cartilage even in an adult.

Ball and socket joint.

Joint between lower jaw and skull.

In which middle portion of body is large as compared to head or tail portion.

Human skeleton is formed by bones and cartilages.

All of the above.

Skeleton.

Ball and socket joint.

The bones that join the chest bone and back bone.

The place where two bones are joined is called a joint.

Skull.

The given figure represents backbone. Backbone protects the spinal cord. It is made up of a series of small bones called vertebrae.

Pivotal joint.

All of these.

Hinge joints.

Snail is an invertebrate.

Pivot joint allows us to bend our head forward and backward and turn the head to our right or left.

Knee joint, neck joint and elbow joints can be bent easily.

Ball and socket joint allows movement in many directions. The shoulder joint and hip joint are examples of ball and socket joint.

Incus.

Muscle.

Two.

Hinge joint.

Ribcage.

Three pairs of legs and two pairs of wings.

Nervous system.

Gliding joint.

Our shoulder has the ball and socket joint that allows circular movement. When you bowl while playing cricket, you rotate your hand in full circle.

Insect is an arthropod. Arthropods move with the help of jointed appendages.

Gait means manner of movement.

Fins help the fish to move in water. The forward movement of the fish starts with front and sideways push of the tail. The flexible and strong tail fin of the fish pushes the water and propels the fish forward.

Coccyx.

Bone has a soft substance called bone marrow inside it.

Fibula.

In human body nose and ears contain cartilage.

 Cartilage is present in upper parts of the ear that is not as soft as the ear lobe, not shards as a bone.

Two muscles (a pair) work together to move a bone. When one muscle of the pair contracts, then the other muscle of the pair is relaxed. The alternate contraction and stretching brings about the movement.

Snake has a backbone. The animals with backbone are called vertebrates.

The remains of tiny sea animals resembling shells.

All of the above.

Hinge joint allows back and forth movement only. Bones in the knee, elbow, finger, and toes have hinge joint.

Pivot Joint.

Arm.

Tendons.

Skull.

Ball and socket joint.

Cockroach can walk, climb and can also fly in air. The muscles in the breast region move the legs for walking while another set of breast muscles move the wings during flying.

All of these.

The ribs make a cage of bones around the chest called rib cage. The rib cage in humans protects the heart and lungs.

Five.

All of these.

Our bones and muscles together form the musculoskeletal system that enables the movement of body parts and the whole body from one place to another.

Snakes.

The hinge joint between upper and lower arm and at knee allows back and forth movement.

Joint.

Hip and shoulder joints are called ball and socket joint.

Snakes have bones and muscles and moves by alternate contraction and expansion of body.

Scapula.

 It is not as hard as bones.

Pivotal joint where our neck joins the head.

Seven.

The skeletal system is the framework of bones that support our body and keeps it upright.

Skeletal system gives shape and support to our body. The backbone holds the body upright.

The fin-like flippers worn by underwater divers help to swim easily in water. It mainly helps to keep the balance of the body and to keep direction, while swimming (just as fins in fishes).

Skeletal system.

Neck joint is called pivot joint.

Side-to-side as well as backward and forward movement.

Earthworm.

Streamlined body.

Cranium.

All of the above.

Hinge joint.

Fishes have streamlined body covered with scales, a swim bladder and a flexible vertebral column attached to muscles.

The animals in the figure given below are worms. Worms move by expansions and contractions.

There are no bones in body of earthworm. The earthworm moves by alternate extension and contraction of body using muscles.

Fixed joint.

All the given statements are correct.