Olympiad Test: Characteristics of Living Beings - Class 6 MCQ

Adaptation refers to the process or the physical/behavioral features that allow an organism to adjust to its environment. For instance, the long neck of a giraffe helps it reach high leaves for food in its habitat, showcasing adaptation to its surroundings.

The figure represents the interdependence between plants and animals. Animals depend on plants for food and oxygen. Plants depend on animals for carbon dioxide.

Basic needs required for a plant to grow are air, water and sunlight. It prepares its food in the presence of sunlight. Its shoot system or stem respond to light and bends towards the direction of sunlight.

Cactus plants grow in deserts.

The white fur helps the polar bear to conserve heat and white surfaces are poor radiators of heat. Fat stored under its skin provides insulation against heat loss thus helping the animal to survive in the extreme cold conditions in the arctic region.

To protect themselves from extreme cold, some animals like penguins have thick skin and a thick layer of fat under their skin.

Terrestrial ecosystem includes those organisms which live on land. It is classified into three types ? Forest ecosystem. Grassland ecosystem and Desert ecosystem.

Saline water, characterized by its salt content, is the type of water found in the sea. The salt concentration is unsuitable for most freshwater organisms but supports a diverse array of marine life due to their adaptation to saline conditions.

The long legs of camels aid in keeping their bodies farther away from the hot desert sand, reducing heat absorption and facilitating cooling, thus assisting them in maintaining a stable body temperature in extreme climates.

Scales provide fish with protection and buoyancy, assisting them in maintaining their position in water without constantly expending energy to swim or balance.