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.
What is the importance of DNA copying in reproduction?
The acid rain affects living and non- living components of environment. In July 1982, Stockholm- the venue of U N –conference on acid rain, suffered heavy acid showers for about a week. In India too, acid rains have been reported since last twenty years in areas where thermal power plants are located and also around Delhi, the capital of India.
A forest is a highly complex and constantly changing environment. It is made up of a variety of living things like wildlife, trees, shrubs, wildflowers, ferns, mosses, lichens, fungi and microscopic soil organisms; and non-living things such as water, nutrients, rocks, sunlight and air. Trees are the biggest part of this complex community.
We rear and take care of animals to take their support in food production. Their systematic and proper rearing and also the arrangement for their proper reproduction and management are called as Animal Husbandry.
With the growth of human population, more and more land was cleared for cultivation, housing and cattle rearing. Later, as towns and cities started developing, vast areas of land were started to be consumed in making roads, rail tracks, bridges, buildings, markets, trade centres, Educational and Research Centres, hospitals, railway junctions, etc.
Medicinal weed Argemone Mexicana or Satyanasi is a prickly weed. It has been introduced and naturalized in India. It grows as waste land weed in almost every part of the country. It is reported as crop weed also in many parts of the country.
These birds used to fly in and around our houses about some decades ago. But these birds are very rarely seen in our surroundings.
Tulsi or the Holi Basil is taxonomically called as Ocimum tenuiflorum. It is an aromatic and perennial plant which belongs to the taxonomic family Lamiaceae
The unit of biosphere having all the components producers, consumers and decomposers and the abiotic components together with physical factors in dynamic relationships is called as ecosystem.
A Pesticide is a chemical substance of natural or synthetic origin. It is applied in different forms to kill pests. Pests are living organisms that tend to harm humans, their crops and animals or have a tendency to disturb general household and living conditions. Some organisms can also be applied to kill pests. These organisms are called as biopesticides. On the other hand, pesticides that are synthesized in factories are called as synthetic pesticides.
