Tissue culture was first devised at the beginning of the
twentieth century [Harrison, 1907; Carrel, 1912] (Table 1.1)
as a method for studying the behavior of animal cells free
of systemic variations that might arise in vivo both during
normal homeostasis and under the stress of an experiment.
As the name implies, the technique was elaborated first
with undisaggregated fragments of tissue, and growth was
restricted to the migration of cells from the tissue fragment,
with occasional mitoses in the outgrowth.
.The Project Gutenberg EBook of Anecdotes of the Habits and Instinct of Animals, by R. Lee This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.org Title: Anecdotes of the Habits and Instinct of Animals Author: R. Lee Illustrator: Harrison Weir Release Date: June 30, 2007 [EBook #21973] Language: English
The Project Gutenberg EBook of The Minds and Manners of Wild Animals by William T. Hornaday Copyright laws are changing all over the world. Be sure to check the copyright laws for your country before downloading or redistributing this or any other Project Gutenberg eBook. This header should be the first thing seen when viewing this Project Gutenberg file. Please do not remove it. Do not change or edit the header without written permission. Please read the "legal small print," and other information about the eBook and Project Gutenberg at the bottom ...
Cells are tiny building blocks that make up all living things. Cells are so small that you need a microscope to see them.
This is the control centre of the cell. It contains chromosomes with DNA instructions for all the cell’s activities, including instructions to make new cells. This is a jelly like substance, in which many of the cell’s activities, e.g. respiration and protein synthesis occur. This is a thin skin around the cell. It is selectivelt permeable, controlling what goes in and out of the cell....
In laboratory conditions (relative humidity 50-70%, temperature 25 ± 2 ° C, 16 h light) monitoring studies of biological interactions between spiders catch prey Amblyseius cucumeris (Oudermans) and Orius bugs prey sauteri (Poppius) in an environment with lots of prey thrips thrips palmi (Karny)
Rarely in the modern history of humans has biology played such an
important role in human affairs as it does today. In the eighteenth and
nineteenth centuries, explorers stimulated the first major advance in biology by
bringing back countless new species that Darwin, and others, put into a logical
order based on the theory of natural selection. The development of evolutionary
thinking and the clarification of the rules of genetic inheritance resulted in the
theoretical base for targeted artificial selection—an essential component of
progress in biology and agriculture....
The timing of the publication of this book couldn’t be better as we celebrate the
50th anniversary of Charles Elton’s seminal book, The Ecology of Invasions by
Animals and Plants. Since this influential book was published in 1958, the study of
bioinvasions has developed exponentially, alongside the exponential growth in the
magnitude of the invasion problem itself. Today, bioinvasion, a highly complex
ecological process and environmental concern, has become a specific branch in
ecology and environmental studies, with many disciplines developing within it....
The Project Gutenberg EBook of Concerning Animals and Other Matters by E.H. Aitken, (AKA Edward Hamilton) This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online
In response to requests from Congress, NASA asked the National Research Council to undertake
a decadal survey of life and physical sciences in microgravity. Developed in consultation with members
of the life and physical sciences communities, the guiding principle for the study is to set an agenda for
research for the next decade that will allow the use of the space environment to solve complex problems
in life and physical sciences so as to deliver both new knowledge and practical benefits for humankind as
we become a spacefaring people.
Conserving biodiversity is a daunting and complex task. Perhaps
no species presents a greater challenge than the giant panda – one
of the most recognized and threatened animals on the planet. Its
difficult-to-traverse, mountainous habitat in China makes quantifying
population numbers in the wild exceedingly difficult. Despite a recent
survey suggesting that the wild population may be growing, there is no
disagreement that the primary threat is severely fragmented habitat.
From microorganisms to whales, from single cells to complex organisms,
from plants to animals to fungi, from body plans to behavior, the diversity
of life is amazing. Living organisms have a profound impact on our
physical world of ocean, landscape, and climate; around us is a multitude
of diverse ecosystems that provide a livable environment and many valuable
resources. The study of life—biology—is a multifaceted endeavor that uses
observation, exploration, and experiments to gather information and test
hypotheses about topics ranging from climate change to stem cells.
Over the past several years, scientists from the United States and
around the world have been using a technique called DNA sequencing to unlock
the genetic code of many different organisms. With code in hand, scientists can
design sophisticated experiments that will inform our understanding of how an
organism develops and functions. To date, they have carried out partial or
complete DNA sequencing on human, mouse, rat, bacterial, and plant genomes.
A major finding that was confirmed from these efforts is that most biologic
functions are genetically conserved within and between species....
Chapter 1 introduction the scientific study of life. In this chapter, the following content will be discussed: The characteristics of life, humans are related to other animals, science as a process, making sense of a scientific study, science and social responsibility.
Prokaryotes, yeasts and plants synthesize thiamin (vitamin B1) via complex
pathways. Animal cells capture the vitamin through specific high-affinity
transporters essential for internal thiamin homeostasis. Inside the cells, thi-amin is phosphorylated to higher phosphate derivatives. Thiamin diphos-phate (ThDP) is the best-known thiamin compound because of its role as
an enzymatic cofactor.
Quinone reductases are ubiquitous soluble enzymes found in bacteria,
fungi, plants and animals. These enzymes utilize a reduced nicotinamide
such as NADH or NADPH to reduce the flavin cofactor (either FMN or
FAD), which then affords two-electron reduction of cellular quinones.
Chapter 32 - An introduction to animal diversity. After completing this chapter, students will be able to: List the characteristics that combine to define animals; summarize key events of the Paleozoic, Mesozoic, and Cenozoic eras; compare the developmental differences between protostomes and deuterostomes.
Chapter 40 - Basic principles of animal form and function. This chapter distinguish among the following sets of terms: collagenous, elastic, and reticular fibers; regulator and conformer; positive and negative feedback; basal and standard metabolic rates; torpor, hibernation, estivation, and daily torpor. This chapter also relate structure with function and identify diagrams of the following animal tissues: epithelial, connective tissue (six types), muscle tissue (three types), and nervous tissue.
Chapter 41 introduce to animal nutrition. After studying this chapter you will be able to: Name the three nutritional needs that must be met by an animal’s diet; describe the four classes of essential nutrients; distinguish among undernourishment, overnourishment, and malnourishment; describe the four main stages of food processing;...