Test: Organism And Its Environment

The inactive stage during winter or the dormancy during winter is called hibernation. It is known as winter sleep. Aestivation in animals is the dormancy during summer or thy weather while in plants, it is the arrangement of parts in flower bud. Adaptation is the sum total of environmental conditions achieved by the organisms in a particular habitat. Acclimatization is the gradual physiological adaptation in response to environmental changes.

Ecology is the study of interaction between living organism and their environment. The basic unit of study in ecology is organism.

A xerophyte is a species of plant that has adaptations to survive in an environment with little liquid water, such as a desert or an ice- or snow-covered region in the Alps or the Arctic.

Succulent plants store water in their stems or leaves.

This is a large regional unit characterised by a major vegetation type and associated fauna found in a specific climate zone. The biome includes all associated developing and modified communities occurring within the same climatic region, e.g., forest biomes, grassland and savanna biomes, desert biome, etc.

On a global scale, all the earth’s terrestrial biomes and aquatic systems constitute the biosphere.

A helophyte is a plant that grows in marsh, partly submerged in water, so that it regrows from buds below the water surface.Fringing stands of tall vegetation by water basins and rivers may include helophytes. Examples include stands of Equisetum fluviatile, Glyceria maxima, Hippuris vulgaris, Sagittaria, Carex, Schoenoplectus, Sparganium, Acorus, yellow flag, etc.

Temperate deciduous or temperate broad-leaf forests are dominated by trees that lose their leaves each year. They are found in areas with warm moist summers and cool winters.  Examples of typical trees in the Northern Hemisphere's deciduous forests include oak, maple, beech and elm, while in the Southern Hemisphere, trees of the genus Nothofagus dominate this type of forest. 

Homeotherms: Animals who maintain a constant internal body temperature across a wide range of environmental conditions. Most mammals and birds are homeotherms.

Aerenchyma present in hydrophytic plants which provides buoyancy to floating in water. 

Ectotherm, Any so-called cold-blooded animal that is, any animal whose regulation of body temperature depends on external sources, such as sunlight or a heated rock surface. The ectotherms include the fishes, amphibians, reptiles, and invertebrates. The body temperatures of aquatic ectotherms are usually very close to those of the water. Ectotherms do not require as much food as warm-blooded animals (endotherms) of the same size, but most cannot deal as well with cold surroundings.

Biological organisms starts with sub-microscopic molecular level like viruses, bacteria etc. These organisms are unable to be seen by naked eyes without the help of microscope or even electron microscope.