Understanding Organisms and General Characteristics
Understanding Organisms, Characteristics, Functions, Classifications and Structures: Are living things consisting of many interrelated components and working together to achieve common goals
Organism
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Understanding Organisms
The word "organism" comes from the Greek "organismos", or "Organon", which means "instrument, application, instrument, sense organ or concern". It first appeared in English in 1703 (Oxford English Dictionary). Organisms are directly related to the term "organization". The term organism may be broadly defined as an assembly of molecules that function as a more-or-less stable whole that shows the characteristics of life. This organism includes all individual living things that can react to stimuli, reproduce, grow, and maintain homeostasis (self-regulation).
Organisms are living things consisting of many interrelated components and work together to achieve a common goal. Organisms come in various sizes, shapes and lifestyles, but they all share some of the same characteristics. All organisms need food (nutrition) and remove waste, grow, multiply and eventually, die.
The characteristics that are commonly found in many organisms are as follows:
Requires nutrition / food
Breathe
Move
Grow
Breed
Sensitive to stimuli
Adapt, and there is a chemical composition
Removing waste
However, these characteristics are not universal. Microorganisms such as bacteria do not breathe, but use other chemical pathways. Many organisms are unable to move independently and many organisms cannot reproduce, even though their species are capable.
Characteristics and Types of Organisms
Living things are collectively referred to as organisms, because their bodies consist of one or more organs and organelles to carry out various processes in all life.
Unicellular Organisms
Unicellular organisms
An organism, which consists of only one single cell and is smaller and simpler when compared to multicellular organisms. Unicellular organisms carry out all special functions in one cell. Life, which cannot be seen with the naked eye, is a unicellular organism. Examples of unicellular organisms; Unicellular organisms include amoebas, bacteria and some forms of algae such as diatoms.
Unicellular organisms carry out all special functions in one cell. Life, which cannot be seen with the naked eye, is a unicellular organism.
Examples of Unicellular Organisms
The majority of microbes (including viruses) are unicellular in organizations. According to the theory of evolution, unicellular organisms were the first to develop on Earth. Their origin dates back to 3.8 billion years ago. Each of them has several characteristic features, which help in adaptation to various environmental conditions. You can find single-celled organisms in every habitat, even in the most friendly conditions.
Amoeba
Amoeba
Amoeba is also a protozoan, a eukaryotic unicellular, which is found in almost all freshwater habitats. Famous for its unique mode of motion, it has no particular shape. In fact, the shape of cells depends on the conditions prevailing. Whenever needed, amoeba extends the prosthetic limb (pseudopodia), and uses it for phagocytosis and movement.
Paramecium
Paramecium
A eukaryotic, protozoan sandal, paramecium consists of one cell. His body is covered with hair like minute cilia, which helps in motion and eating. Reproductive paramecium is studied in detail, so as to understand the degree of multiplication. Under favorable conditions, it reproduces by asexual method, while under stress, reproduction takes place sexually.
Bacteria
Bacteria
All of us have a brief idea about bacteria. Right from the formation of yogurt to cause infectious diseases, bacteria that are present anywhere in the environment. They are minute and have various shapes (stem, round, spiral, etc.). Some strains of bacteria are adapted to harsh conditions such as deep in the earth's crust and hot water. They play an important role in nutrient recycling.
Cyanobacteria
Cyanobacteria
Also known as blue-green algae (BGA), cyanobacteria are unicellular organisms. It has the characteristics of both bacteria and algae, hence the name. Cyanobacteria resemble algae because they both undergo photosynthesis for food production. While the prokaryotic nature of BGA makes it similar to bacteria.