Andrew Hodgkiss Unit 22 Information sourced from various sites on the Internet. Bacteria, viruses, fungi, and parasites: The first bacteria a usual size is but a few micrometers in length shapes ranging from spheres to rods and spirals. Bacteria are present in most of the Earths habitats such as soil, water, acidic hot springs and radioactive waste also, found in/on animals and plants. Some bacteria are beneficial to human existence others can be fatal in developed countries antibiotics are used to treat bacterial infections. Viruses are small infectious agents that replicate only inside the living cells of other organisms, Viruses infect all types of life forms from animals, plants and bacteria.
They are found naturally in humans, as well as plants and animals. Bacteria multiply by themselves to spread. Bacteria rapidly reproduce and make toxins that kill or damage cells. They differ from viruses, fungi and parasites because they do not always cause harm, sometimes they can be beneficial. In fact only 1% of bacteria are harmful.
The Causes and Spread of Infections CANDIDATE NAME: DATE: IC02 Page 0 10/13/2013 IC02 - THE CAUSES AND SPREAD OF INFECTIONS MICRO-ORGANISMS ARE OFTEN DEFINED AS: Collin English Dictionary Definition: noun any organism, such as a bacterium, protozoan, or virus, of microscopic size WHAT ARE THE FOLLOWING AND GIVE AT LEAST ONE COMMON ILLNESS, DISEASE OR INFECTION THAT THEY CAN GIVE. BACTERIA Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals. Bacteria were among the first life forms to appear on Earth, and are present in most habitats on the planet. Bacteria inhabit soil, water, acidic hot springs, radioactive waste, and the deep portions of Earth's crust. Bacteria also live in plants, animals, and have flourished in manned space vehicles.
CAUSES AND SPREAD OF INFECTION 1. Understand the causes of infection 1.1 Identify the differences between bacteria, viruses, fungi and parasites Bacteria - Typically a few micrometres in length, bacteria have a number of shapes, ranging from spheres to rods and spirals. Bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit soil, water, acidic hot springs, radioactive waste, and the deep portions of Earth's crust. Bacteria also live in symbiotic and parasitic relationships with plants and animals.
Sea urchins and humans share more than 7,000 genes, and biologists are now using these sea creatures to unlock the mysteries of human diseases. In fact, there are several genes in the sea urchin involving Alzheimer's, Parkinson's disease, muscular dystrophy and many other
Causes and Spread of Infection The differences between Bacteria, viruses, fungi and parasites are Bacteria are found everywhere ie, air, water, soil, animals, people and food. It is a single cell micro-organism that retrieves its nutrition from the environment. Bacteria can only be seen through a microscope. They are shaped like short rods, spheres or spirals. It is stated on www.biologyinfo.com that, “Not all bacteria are harmful.
Identify the differences between bacteria, viruses, fungi and parasites Answer: Bacteria Bacteria are single-cell microorganisms which generally exist in large numbers and are microscopic in size. Bacteria can be either beneficial (bacteria in the intestinal tract aid digestion and are part of the normal body flora) or can be the cause of disease (for example pneumonia, food poisoning or bacterial meningitis). Viruses A virus is an infectious agent which can only live and replicate inside organism cells. The main difference between viruses and bacteria is that they are unable to reproduce in food – they need a living host cell to replicate. They replicate by infecting and taking over the functions of the host cell.
Advanced biology week 1 assignment 1. Bacteria are prokaryotes because they are not living organisms; they are simply genetic information wrapped in a protein sheath and they cannot replicate without the help of a cell. 2. Coccus bacteria is bacteria have a spherical shape. In nature, these bacteria may exist as individuals cells or be grouped together.
Outcome 1 Understand the cause of infection 1.Identify the difference between bacteria, viruses, fungi and parasites. Bacteria Bacteria is a single celled organism, bacteria have evolved to thrive in almost any environment and can be found in almost any substance/surface and also in the human body, only 1% of bacteria is actually harmful. It's bad or infectious bacteria that cause illness as they rapidly reproduce and produce a toxin that kills or mutates cells, bacteria is also self sufficient. Viruses A virus is a small capsule that contains DNA or RNA, viruses, unlike bacteria are not self sufficient and need a host in order to reproduce I.E a human body. When a virus enters the body, it enters some certain cells and takes over making the now host cell make the parts the virus needs to reproduce, the cells are eventually destroyed through this process.
causes and spread of infection outcome 1 understand the causes of infection · identify the differences between bacteria, viruses, fungi and parasites Bacteria: Bacteria are living things that are neither plants nor animals, but belong to a group all by themselves. They are very small--individually not more than one single cell--however there are normally millions of them together, for they can multiply really fast.Bacteria are prokaryotes (single cells that do not contain a nucleus). Bacteria is a single celled organism and, unlike viruses, do not need a living host to reproduce. Viruses: A virus is a small infectious agent that can replicate only inside the living cells of organisms. Most viruses are too small to be seen directly with a light microscope.