Skip to main content

Posts

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 autotrophic organisms are further categorized as  a) photoautotrophs and  b) chemoautotrophs . 
Photoautotrophs are the green coloured plants and some algae . They synthesise living matter ( organic compounds ) from the inert inorganic materials in the presence of chlorophyll and solar energy . Whereas , chemoautotrophs utilize energy released by their chemical processes , for the purpose of synthesising their food , e.g. sulphur bacteria .
 On the other hand , heterotrophs depend upon the autotrophs directly or indirectly for the purpose of their food . facile Photosynthesis is a physiological process by which green plants in the presence …

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 chapter, you are going to study about, the most fundamental processes occurring in plants which have tremendous importance in their life. These are - absorption of water and minerals by the roots, ascent of sap, transpiration, photosynthesis and respiration.

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.

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 born and die, but they do not have birth rates and death rates. These are the characteristics of the human population as a whole.

All the human populations inhabiting the same area constitute a biotic community.

Division of Nervous System : Central & Peripheral Nervous System

DIVISION OF NERVOUS SYSTEM 

Nervous System :Function, Unit & Structure of Nervous System

Nervous System : Function, Unit & Structure of Nervous System In multicellular animals, there are present many organs and organ systems. Every organ system performs a these organ systems collectively constitute an organism. Have you ever thought that how can many be made one ? How can unification (integration) be achieved ? We are going to discuss about Nervous System, Function of Nervous System, Unit of Nervous System & Structure of Nervous System.

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.

Describe the Location and Structure of Human Heart in detail.

Human heart is a reddish brown, pulsatile, pumping centre. It pumps and collects blood to and from the various body parts. It is of the size of a human closed fist. It weighs about 300 g. It is a broad conical structure. Upper side of human heart is broad called base and the lower pointed side is called apex.