A virus is defined as any of a various number of submicroscopic parasites that can infect any animal, plant or bacteria and often lead to very serious or even deadly diseases. A virus consists of a core of RNA or DNA, generally surrounded by a protein, lipid or glycoprotein coat, or some combination of the three. No virus can replicate without the help of a host cell, and though they can be spread, viruses lack the ability of self-reproduction and are not always considered to be living organisms in the regular sense. (www.Howstuffworks.com)



Bacteria are microscopic organisms whose single cells have neither a membrane-bounded nucleus nor other membrane-bounded organelles like mitochondria and chloroplasts. Another group of microbes, the archaea, meet these criteria but are so different from the bacteria in other ways that they must have had a long, independent evolutionary history since close to the dawn of lifefile:/Users/student/Desktop/light-virus-1.jpg



Fossil range: Paleoarchean - Recent
Halobacteria sp. strain NRC-1, each cell about 5 μm in length.
Halobacteria sp. strain NRC-1, each cell about 5 μm in length.

Halobacteria sp. strain NRC-1, each cell about 5 μm in length.
Scientific classification

Woese, Kandler & Wheelis, 1990


The Archaea
[ɑrˈkiə] (help·info)
are a group of single-celled microorganisms. A single individual or species from this domain is called an archaeon (sometimes spelled "archeon"). They have no cell nucleus or any other organelles within their cells. In the past they were viewed as an unusual group of bacteria and named archaebacteria but since the Archaea have an independent evolutionary history and show many differences in their biochemistry from other forms of life, they are now classified as a separate domain in the three-domain system. In this system, introduced by Carl Woese, the three main branches of evolutionary descent are the Archaea, Eukarya and Bacteria. Archaea are further divided into four recognized phyla, but many more phyla may exist. Of these groups the Crenarchaeota and the Euryarchaeota are most intensively studied. Classifying the Archaea is still difficult, since the vast majority of these organisms have never been studied in the laboratory and have only been detected by analysis of their nucleic acids in samples from the environment. Although archaea have, in the past, been classed with bacteria as prokaryotes, this classification has been described as outdated, since it fails to distinguish between the three very distinct domains of life.[1]

Pant animal cell


Plant Cell Structure And Basic Animal Cell Diagrame

One important parts of the animal cell is the Nucleus which holds the cells DNA. It is also the control center to the cell. Another important part of the animal is the Golgi Complex which helps the cell organelles package waste materials to be transported out of the cell.

Basic Animal Cell

Endoplasmic Reticulum-Endoplasmic reticulum is a group of tubules, vesicles and sacs that are interconnected.

Golgi Complex-The Golgi complex is found in most cells. It is packaging organelle like the endoplasmic reticulum.

Ribosomes-The protein builders, or protein synthesizers of the cell.

Lysosomes- Lysosomes are membrane-bound vesicles that contain hydrolytic enzymes.

Nucleus- The main control particle in the cell, usually located in the center of the cell.

Mitochondria- A membrane-enclosed organelle found in most eukaryotic cells.

Organelle- A sub-unit in the cell that is designated to perform a specific function.

Endoplasmic Reticulum- a eukaryotic organelle that forms an interconnected network of tubes, visicles, and within cells.

Wild animal Deer

buck.jpgI like the wild white deer because It is so cool because of the antlers and because I hunt them too.