A Closer Look at Biology, Microbiology, and the Cell - download pdf or read online

By Sherman Hollar

ISBN-10: 1615305637

ISBN-13: 9781615305636

Formalizing examine of the wildlife could seem like a frightening job contemplating the sheer breadth and diversity of dwelling issues that inhabit the planet. From the microscopic organisms within the worlds such a lot distant destinations to these within the human physique, facts of the difficult constructions and mechanisms that let lifestyles are ubiquitous and new discoveries continually demonstrate new chances that call for to be tested. This quantity surveys the multitude of matters that include the sphere of biology and contains an summary of the improvement of biology, microbiology, and cellphone conception.

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By Sherman Hollar

ISBN-10: 1615305637

ISBN-13: 9781615305636

Formalizing examine of the wildlife could seem like a frightening job contemplating the sheer breadth and diversity of dwelling issues that inhabit the planet. From the microscopic organisms within the worlds such a lot distant destinations to these within the human physique, facts of the difficult constructions and mechanisms that let lifestyles are ubiquitous and new discoveries continually demonstrate new chances that call for to be tested. This quantity surveys the multitude of matters that include the sphere of biology and contains an summary of the improvement of biology, microbiology, and cellphone conception.

Show description

Read or Download A Closer Look at Biology, Microbiology, and the Cell (Introduction to Biology) PDF

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Extra info for A Closer Look at Biology, Microbiology, and the Cell (Introduction to Biology)

Example text

Pasteur was the first to propose that microbes cause chemical changes as they grow. Koch derived a central principle of modern microbiology, known as Koch’s Postulate, that determines whether a particular germ causes a given disease. Pasteur and his contemporaries developed pure culture methods for the growth of microbes. By diluting mixtures of microbes in sterile solutions, they were able to obtain droplets that contained a single microbe, which could then be grown on fresh, sterile media. In a separate procedure, they used rapid, sequential passage of cultures so that certain specimens were able to outgrow others.

He first became a haberdasher (a dealer in men’s clothing and accessories) and draper (a dealer in cloth or clothing and dry goods) and, in 1660, chamberlain to the sheriffs at Delft. His hobby was lens grinding. In his lifetime he ground about 400 lenses, most of which were quite small, with a magnifying power of from 50 to 300 times. It was not only his lenses that made him world famous but also his work with the microscope. His keen powers of observation led to discoveries of major significance.

The bacterial cell wall is composed mostly of peptidoglycan, which is made up of polysaccharides and amino acids. The cell walls of the diatom (a tiny one-celled organism) have a high concentration of silica, which gives them a glasslike appearance. Cytoplasm Water is the largest component of cytoplasm. Depending on the cell and its needs and conditions, water concentration varies from about 65 percent to roughly 95 percent. Suspended in the water are various solids such as proteins, carbohydrates, fat droplets, and pigments.

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A Closer Look at Biology, Microbiology, and the Cell (Introduction to Biology) by Sherman Hollar


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