Search Results for: ur-defenses
Parasitism
Organisms depend on different sources of food to survive. Larger organisms like plants make their own food (autotrophs) and... Read More
Natural selection
Natural Selection Definition What is natural selection in biology? Natural selection is defined as a process in nature... Read More
Biological Cell Defense
Organisms must find a means of defense against antigens such a viruses described on the previous tutorial. If this was not... Read More
Obligate parasite
Parasitism is a form of symbiosis that occurs between a parasite and its host. The parasite is the organism that generally... Read More
Naked virus
Viruses are infectious entities with size ranges between 20 to 400 nanometers. The mammoth-sized virus would be about the... Read More
Volatile oil
Volatile Oil Definition Volatile oils are aromatic compounds that are characterized by their volatility and inability to... Read More
Enterobacter aerogenes
Definition Noun A gram-negative rod shaped motile and encapsulated bacterium and have peritrichous flagella that surrounds... Read More
Arthropods
There are over two million species of arthropods, who initially arrived on Earth in the middle of the Cambrian period.... Read More
Homeostatic Mechanisms and Cellular Communication
Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory... Read More
Types and Causes of Brain Damage
The brain is a highly specialized tissue, far more complex than today's 21st-century supercomputers. Due to this magnificent... Read More