The total area where living beings are found is called as biosphere. It can be divided into many small independent units called as Ecosystem. In fact, the unit of biosphere which incorporates many types of microorganisms, plants and animals, physical factors like soil, water, air etc. interacting among themselves is called as ecosystem
Substances that are thrown out to some place due to their uselessness or excreted out of our body are called as waste substances.
Man is surrounded by various life forms, forces and conditions- both physical and biological. Sunlight, land, air and water form physical conditions whereas all the plants, animals, and microorganisms form biological conditions.
Urban areas are usually densely populated locations. People migrating from villages towards cities further increase the population burden of cities. Thus urban areas are suffering from serious congestion and traffic problems. Here is a case of Ranchi.
Studies and researches that are done in different fields from time to time show increasing complexities in organisms than their ancestors. These studies and evidences show many important evidences of organic evolution.
Deepawali is the time of functions. This is the time when we meet with our friends and relatives. The atmosphere of love and recreation remains all around at this time. But we never think that we forget certain other important things at this time.
1. Trait-A exists in 10% of a population of an asexually reproducing species and trait-B in 60%of the same population….
Determining male or female form of living organism through sexual reproduction is called as sex determination. Sex determination on a large scale is of two types- environmental, genetic and chromosome based.
There are more than 10,000 species of reptiles. This day helps us understand vast types of their species and their habitats. This day also provides us knowledge about benefits that we get from the world of reptiles.
Some specific characters are found in the parents of each species. These characters are transferred from generation to generation through the process of sexual reproduction.
The balance of nature is maintained by its different components -living and non-living, if they remain unaltered by human beings.
Ozone absorbs ultraviolet radiations so that much of it is never allowed to reach to the earth surface. The protective umbrella of ozone layer in the stratosphere protects the earth from harmful ultraviolet radiations. Ozone plays an important role in the biology and climatology on the earth’s environment. It filters out all the radiations that remain below 3000Å. Radiations below this wavelength are biologically harmful. Hence any depletion of ozone layer is sure to exert catastrophic impacts on life in the biosphere.
