What are the Characteristics and Functions of Harmones ?

Endocrine(ductless) glands that control, communicate, coordinate and integrate various functions of all the body organs, by the secretion of chemical messengers called hormones collectively constitute endocrine system. Working alone or in concert as a single neuroendocrine system, they perform the same general functions. The endocrine glands secrete very minute quantities of chemical messengers called hormones (Gk. … Read more

Describe the Mechanism and the Factors affecting Photosynthesis.

All metabolism begins with the chemical raw materials that are collectively referred to as food . Some organisms are capable of synthesising organic materials from inert inorganic substances . Such organisms are known as autotrophs . Whereas , others depend upon autotrophs directly or indirectly for the purpose of food and known heterotrophs . The … Read more

How does the Absorption of Water & Minerals by Roots take place ?

Plant physiology is the branch of Biology that deals with the study of functions of a plant. It includes functioning of cells, tissues, organs, organ systems and the organisms as a whole. Here in this topic, you are going to study about, the most fundamental processes occurring in plants which have tremendous importance in their … Read more

Describe briefly about Pollution and its types.

What is Pollution ? Pollution is an undesirable change in the physical, chemical and biological characteristics of environment. It is harmful to human life and other organisms. Agents causing pollution are known as pollutants. Or It is the addition of unwanted constituents to air, water or land, which deteriorates the natural quality of the environment. … Read more

How to control the growth of Human Population ? Reasons and Control

Human Population may be defined as a group of organisms belonging to one species which occupy a given area. It has characteristics which are a function of the whole group and not of the individuals. These are population density, birth rate, death rate, age distribution, biotic potential, rate of dispersion and growth form. Although individuals are … Read more

Describe the role of kidney as a part of Excretory System.

As a result of the complex chemical reactions taking place within the body, certain metabolic waste products are formed. For example : large amounts of CO2 and water are produced from metabolism of carbohydrates, fats and proteins. We are going to discuss about Excretory System, products from Excretory System & structure of kidney. Ammonia, urea … Read more