high school environmental science

>Do all these variations in individuals have the same chances of surviving differences in environmental factors like food, temperature, habitat change etc.? Quite evidently, different variations will give different advantages or disadvantages to individuals. Genetic changes that are herit..

The main aim of this type of forestry is to supply goods and services to meet the local demand for firewood, fodder, food, fertilizers, fibre, timber, medicines etc. It is classified into two types: Social Forestry and Environmental Forestry: Trees which are useful to the tribal people a..

Coal is formed in nature by the 'carbonisation' of wood. Conversion of wood to coal under the influence of high temperature, high pressure, and in the absence of air is termed carbonisatio..

Here the aim is to increase crop production. High yielding crops should be developed for this purpos..

Metals have high density and are very heavy. Iridium and osmium have the highest densities where as lithium has the lowest densit..

The installation and maintenance of an OTEC power plant is very high and efficient commercial exploitation is difficul..

Although there are more than hundred elements around us we do not find these elements in their native form in nature. This is because most of these elements are highly reactiv..

Variations, the raw materials for evolutionary change, are controlled by genes. When there is an error in DNA copying during sexual reproduction it leads to variation. Variations occur due to microevolution, that is, evolution on a small scale-within a species or a single population. It is defined..

This group constitutes the largest group of plants. Seeds are produced inside an ovary which later becomes the fruit. These are highly evolved group of plants. The plant body is distinctly differentiated into roots, stem and leav..

This includes inland and marine fisheries, aquaculture and pisiculture. Fish is a source of high quality animal protein and a rich source of minerals like calcium, phosphorus and iron. India abounds in fish, both fresh water and mari..