The Living Organisms - Characteristics and Habitats

9.1 Organisms and the Surroundings Where they Live

There are many kinds of Living organisms. They different from one another, some were cold, some very hot and dry, and some places so humid.

There are various kinds of living organism seem to be some creatures like ants that were present in all these different locations. The kinds of plants found in each of these regions were so different from the plants of the other regions.

9.2 Habitat and Adaptation

The place where organisms live is called habitat.

In the sea, plants and animals are surrounded by saline (salty) water. Most of them use the air dissolved in water.

There is very little water available in the desert. It is very hot in the day time and very cold at night in the desert. The animals and plants of the desert live on the desert soil and breathe air from the surroundings.

The plants and animals that live on land are said to live in terrestrial habitats. The habitats of plants and animals that live in water are called aquatic habitats.

The organisms, both plants and animals, living in a habitat are its biotic components. The non-living things such as rocks, soil, air and water in the habitat constitute its abiotic components.

When the seed turned into a sprout, it is said to have germinated. This is the beginning of life of a new plant.

9.3 A Journey Through Different Habitats

Some Terrestrial Habitats

Deserts

The Desert means where surrounding all looking sands. A few plants existing there. There are desert animals like rats and snakes, which do not have long legs that a camel has.

Desert plants lose very little water through transpiration. The leaves in desert plants are either absent, very small, or they are in the form of spines.

Mountain regions

There is a large variety of plants and animals living in the mountain regions. There are normally very cold and windy. In some areas, snowfall may take place in winters.

In the mountain trees are normally cone shaped and have sloping branches. The leaves of some of these trees are needle-like.

Grasslands

A lion lives in a forest or a grassland and is a strong animal that can hunt and kill animals like deer. It is light brown in colour. Look at the picture of a lion and that of a deer.

A deer is another animal that lives in forests and grasslands. It has strong teeth for chewing hard plant stems of the forest.

There are many other features of a lion, a deer or other animals and plants that help them to survive in their habitat.

Some Aquatic Habitats

Oceans

There are some sea animals like squids and octopus, which do not have this streamlined shape. They stay deeper in the ocean, near the seabed and catch any prey that moves towards them.

There are some sea animals like dolphins and whales that do not have gills. They breathe in air through nostrils or blowholes that are located on the upper parts of their heads.

Ponds and lakes

There are various kinds of plants existing. In that some of these plants have their roots fixed in the soil below the water.

The terrestrial plants, roots normally play a very important role in the absorption of nutrients and water from the soil.

Some aquatic plants are submerged in water. All parts of such plants are under water. Some of these plants have narrow and thin ribbon-like leaves.

9.4 Characteristics of Organisms

Breathing is part of a process called respiration. In respiration, some of the oxygen of the air we breathe in, is used by the body. We breathe out carbon dioxide produced in this process.

The process of breathing in animals like cows, buffaloes, dogs or cats is similar to humans.

Changes in our surroundings that makes us respond to them, are called stimuli. Changes surrounding us like whether sessions.

Our body produces some wastes in other life processes also. The process of getting rid of wastes by organisms is known as excretion.

Animals reproduce their own kind. The mode of reproduction may be different, in different animals. Some animals produce their young ones through eggs. Some animals give birth to the young ones.

Plants also reproduce. Like animals, plants also differ in their mode of reproduction. Many plants reproduce through seeds. Plants produce seeds.

Living things produce more of their own kind through reproduction. It takes place in many different ways, for different organisms.