Parrot flower botancial species discovery of 1899
By: Leonard Konis
One of the rarest plant's few have ever seen in the world of botany is the Parrot Flower (Impatiens psittacina) looks like a parrot. 1 The flower appears as an orchid but lacks the specific characteristics (three petals and three sepals).5 Impatiens psittacina...
By: Darian Peters
Zoology is the biological discipline that involves the study of animals. There is an important historical difference between zoology in the pre-Darwinian age before Charles Darwin published The Origin of Species, and post-Darwinian times where Charles Darwin's theory of evolution by natural selection increasingly became...
By: Darian Peters
Zoology is the biological discipline that involves the study of animals. There are several different branches of the discipline that focus on particular types of animal or else on aspects of the functioning or behaviour of the particular animal species that is being studied. Within...
How plant stomata function
By: Lime Red Tetrahedron
A Brief Summary of TranspirationThe function of the stomata is ultimately linked to the process of transpiration in plants.TranspirationTranspiration is the evaporation of water from parts of plants, including the leaves, roots, stems, and flowers.Transpiration is essential in transporting water from the roots...
By: Anne StClair
Geological unrest could be considered any period in which there is dramatic change. This includes such long-term shifts as tectonic plate movements, mountains building and crumbling, and short-term and often dramatic geological upheavals such as earthquakes, volcanic eruptions and climate change. Evolution is a mechanism...
Acellular infectious agents: Comparison of viruses, viroids and prions
By: Tami Port MS
Infectious disease can result of cellular organisms, such as bacteria (prokaryotes), from eukaryotes (cells like ours) or from nonliving infectious agents such as viruses, virioids and prions. Here is a summery of the different types of acellular, nonliving infectious agents.* What Is a Cell...
Early germ theory of disease: Contributions of Leeuwenhoek, Semmelweiss and Snow
By: Tami Port MS
Germ Theory is the concept that microorganisms can cause disease, and this theory is the foundation of modern medicine. Here is a summary of some key discoveries.The refutation of spontaneous generation was essential in the development of Germ Theory; the understanding of infectious disease...
Late germ theory of disease: Contributions of Pasteur, Lister, Koch and Fleming
By: Tami Port MS
Germ Theory is the concept that microorganisms can cause disease, and this theory is the foundation of modern medicine. Here is a summary of some key discoveries.Key to the development of Germ Theory, and the understanding of infectious disease, was the refutation of spontaneous...
Early history of immunology: Contributions of Jenner and Pasteur
By: Tami Port MS
Some of the early discoveries that led to today's vaccines happened almost by chance. The astute observations of Edward Jenner and Louis Pasteur were the foundation of modern immunology. * Edward Jenner and the First Vaccine (1790s) * Edward Jenner's legacy was a vaccination for...
Why bears hibernate
By: James Johnson
Why do bears hibernate? It would be as easy to ask why do birds fly south in the fall or salmon go back to the rivers where they hatched to lay their eggs? It is all part of the cycle of nature and the way...

 

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