Discoveries and inventions have made human lives easy and comfortable. Men have stopped walking long distances. But his does not relate to flying of birds. They continue flying and flying for ages very high and up to amazingly long distances.
Fossil fuels- coal, petroleum and natural gas, are sources of energy and lots of useful substances. They have been and still they are the back bones of the economic developments and the basis of the modern civilization.
According to their physical make up, there are basically two types of animals- Vertebrates and invertebrates. Invertebrates are those animals that don’t have a vertebral column or backbone. On the other hand, Vertebrates are those animals who have a vertebral column or the back bone.
On the basis of his experiments of hybridization Mendel proposed following rules of heredity-1. Law of dominance, 2. Law of iseggregation and , 3.Law of Independent Assortment.
These birds used to fly in and around our houses about some decades ago. But these birds are very rarely seen in our surroundings.
The second corona outbreak has filled the society with terror.
There have been a number of environmental movements in India through which people have been protesting for conservation of forests and other natural resources. Here some important People’s Movements have been introduced in brief.
Ever since the earth was inhabited, humans and other life forms have depended on things that exist freely in nature…
Respiration is different in aquatic and terrestrial animals. Aquatic animals repire by means of gills and skin while terrestrial animals breathe in through lungs.
The Pollution of atmosphere leads to severe consequences on local, regional, national and international levels.
The early man started his life as an individual. Gradually he came in contact with his fellows and he started developing a social life. At any period of human life it is hard to understand that a man ever remained in isolation. Thus this hypothesis does not cover the whole thing.
The conditions of a habitat remain changing abruptly and periodically. Abrupt changes in environment often do not give time to an organism to get ready and to face the challenges. As such the organism can survive only when it has sufficient abilities to tolerate these changes.
