Tuesday, 12 April 2022

POPULATION AND COMMUNITY

POPULATION

A group of individuals of a particular species occupying a particular area at a specific time is called as population.

Ex-The entire student body at a school. Lotus plant of a perticular Lake

COMMUNITY

Community is defined as the group of organisms of different species living in same area and interacting with each other.

Ex- a forest of trees and undergrowth plants, inhabited by animals and rooted in soil containing bacteria and fungi,

Monday, 11 April 2022

Types of Soil Pollutant

Types of Soil Pollutants

Soil pollution consists of pollutants and contaminants. The main pollutants of the soil are the biological agents and some of the human activities. Soil contaminants are all products of soil pollutants that contaminate the soil. Human activities that pollute the soil range from agricultural practices that infest the crops with pesticide chemicals to urban or industrial wastes or radioactive emissions that contaminate the soil with various toxic substances.

Biological Agents

Biological agents work inside the soil to introduce manures and digested sludge (coming from the human, bird and animal excreta) into the soil.

Agricultural Practices

The soil of the crops is polluted to a large extent with pesticides, fertilizers, herbicides, slurry, debris, and manure.
Radioactive Pollutants

Radioactive substances such as Radium, Thorium, Uranium, Nitrogen, etc. can infiltrate the soil and create toxic effects.

Urban Waste

Urban waste consists of garbage and rubbish materials, dried sludge and sewage from domestic and commercial waste.

Industrial Waste

Steel, pesticides, textiles, drugs, glass, cement, petroleum, etc. are produced by paper mills, oil refineries, sugar factories, petroleum industries and others as such.
Examples of the most common and problematic soil pollutants can be found below.

• Lead (Pb)...

Mercury (Hg)...

• Arsenic (As) ...

Copper (Cu)...

• Zinc (Zn)...

• Nickel (Ni) ...

• PAHS (polyaromatic hydrocarbons) ...

Herbicides/Insecticides.

Structure and Function of Liver

The Structure and Functions of Liver  The liver is the largest solid organ in the body. It removes toxins from the body's blood supply, ...