level of organization

Different types of tissue may together become organised into an organ for some specific function. E.g., a gland is an organ meant for secretion. In a gland there are four tissues - Epithelium (for secretion) Muscular tissue (for contraction of the gland) Connective tiss..

A group of organs become organized into an organ system for coordinating a major function. Different organs in the digestive system carry out functions related to nutrition in an anima..

An organism is a distinct unit of life in nature. It is said to be the smallest level and basic unit of ecological hierarc..

An organism is a distinct unit of life in nature. It is said to be the smallest level and basic unit of ecological hierarch..

Each link in a food chain is known as a trophic level. For example, in each food chain, plants always form the first trophic level. The plant eating animals called herbivores like insects, rodents, rabbits, deer, cattle, etc. form the second trophic level. The animals..

With world wide awareness about dangers of persisting pesticides in food crops, enormous interest is shown in food grown on organic farming principles. Such food is called organic food . Organic farming is a method of farming wherein synthetic chemical is not used in a..

All living organisms are basically composed of atoms of some chemical elements, particularly carbon, hydrogen, oxygen and nitroge..

In multicellular organisms, cells having a common origin, group to form tissue. The cells in a tissue may be similar in structure to common functions (as in epithelium) or dissimilar in structure performing different functions (as in blood). There are different types of tissues meant for..

In unicellular organisms the cell leads a totally independent life. It does not depend on any other cell for any of its activity, except in cases of sexual reproduction. There is division of labour only at the organelle level since different organelles perform specific functions..

Growth is defined as an increase in the size and weight of an organism due to synthesis of new protoplas..