Living World of Animals Online Test 6th Science Lesson 5 Questions in English

In Jurong Birds Park, Singapore, Penguins are kept in a big glass case with ice bergs and temperature is maintained at 0° C and below.

Amoeba, Paramecium and Euglena are unicellular while, fish, frog, lizard, bird and man are multicellular.

We know Amoeba is an unicellular organism It does all the activities like digestion, locomotion, respiration and reproduction.

Unicellular organisms are small, usually microscopic, cannot be seen with naked eye. They are aquatic, simplest and most primitive of all animals.

We know Amoeba is an unicellular organism It does all the activities like digestion, locomotion, respiration and reproduction.

Amoeba swallows food from the water and the food is digested in the food vacuole. Contractile vacuoles help in excretion. Respiration is by simple diffusion through the body surface.

Amoeba have finger-like structures called Pseudopodia, (false foot) which help in movement or locomotion.

Paramecium is also a unicellular organism which lives in water and move with the help of cilia.

Paramecium is also a unicellular organism which lives in water and move with the help of cilia. Euglena is an unicellular animal which moves with a flagellum.

Unicellular Organisms are made up of single cell. They lack tissues, organs and organ systems. Growth occurs by an increase in the size of the cell.

Multicellular Organisms are organisms are made up of many cells. They are mostly large in size. They are composed of tissues, organs and organ systems.

A Living thing can survive in a particular habitat if its body is adapted to the conditions of that habitat. Plants and animals develop special characteristics or features in their body in order to survive in their habitat (the surroundings). The presence of specific body features for certain habits which enable a plant or an animal to live in a particular habitat is called adaptation.

The head, trunk and tail of a fish merge to form a stream-lined shape. The streamlined body shape helps the fish to move through the water easily.

The fish has strong tail which acts as rudder to change direction and keep its body balance in water.

Lizards are scaly-skinned reptiles that are usually distinguished from snakes by the possession of legs, movable eyelids, and external ear openings. They mostly inhabit warm regions. Most lizards are quadripedal (walk with four legs) and have a powerful limb.

Most lizards eat a variety of insects like mosquitoes and Cockroaches with sharp, tricuspid, teeth adapted for grabbing and holding.

Some lizards (Dinosaurs) have web in the toes, and few lizards are able to glide or parachute the air and make soft landings.

When an animal moves its location as the season changes it is said to be Migration. In Tamil Nadu Bird Sanctuaries are located at Vedanthangal, Kodiyakkarai and Koondhankulam.

The camel has long legs which help it to keep its body away from the hot sand in the desert. A camel can drink large amount of water (when it is available) and store it in the body.

A camel’s body is adapted to save water in the dry desert as follows: A Camel passes small amount of urine; its dung is dry and it does not sweat. Since a camel loses very little water from its body, it can live for many days without drinking water.

A camel’s hump has fat stored in it. In case of emergency a camel can break down stored fat for nourshment.

Spending winters in a dormant condition is called Hibernation E.g. Turtle. On the other hand, spending the hot and dry period in an inactive state is known as Aestivation. eg. Snail

Kangaroo rat does not drink water at all. Whatever food it eats and oxygen it gets from air combine together to form water inside the body.

Mountain Goat lives in Mountains Habitat. Adaptive features of Mountain Goat are Strong hooves for running, long hair to protect from cold.

Polar Bear and Penguin lives in Polar region Habitat. They have Thick skin for protection, white fur and Paddle to swim, walk with two legs respectively.

Lion lives in a Forest Habitat. They are Strong and fast runner has sharp claws to catch prey.

The tail of the bird helps it to control the direction of the movements. They have streamlined body covered with feathers.

Birds breathe through lungs. They have a pair of wings that are modified forelimbs. They have hollow and light bones

Biodiversity includes a variety of ecosystems such as those that occur in deserts, forests, mountains, lakes, rivers and agricultural fields.

Living in such harsh conditions requires special features in these animals which help these organisms to live, breed and excel well in that particular place. Living or dwelling place of an organism is known as habitat.

At a time, birds can see one object with one eye and another object with the other eye. This type of Birds vison is known as Binocular vision.

Birds have strong chest muscles which help them withstand the pressure of the air while flapping their wings during flight.

Usually we see birds fly, however they can also hop, move, run, etc., on the ground and they perch well on the branches of tree with the help of a pair of clawed feet.

Camel has long eye lashes and hairs to protect its eyes and ears from the blowing dust. It can keep its nostrils closed to avoid dust.

The living things form biotic community and non-living things form abiotic community. living creatures, including humans, form a community interacting with one another and with other animals, plants, air, water and soil around them.