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Author: B. Melville Nicholas
Publisher:
ISBN:
Category : Birds
Languages : en
Pages : 162
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Book Description
Author: B. Melville Nicholas
Publisher:
ISBN:
Category : Birds
Languages : en
Pages : 162
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Book Description
Author: Jill Shinkle
Publisher: UCANR Publications
ISBN: 9781601073617
Category : Young Adult Nonfiction
Languages : en
Pages : 96
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Book Description
Part of the Aquatic Science Learning Activities Series. Uses scavenger hunts, outdoor exploration, and model building to learn about the plants and animals that live in wetlands as well as the ations individuals can take to protect wetlands.
Author:
Publisher:
ISBN:
Category : Libraries
Languages : en
Pages : 392
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Book Description
Author: Child
Publisher:
ISBN:
Category :
Languages : en
Pages : 716
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Book Description
Author: G.A. Wobeser
Publisher: Springer Science & Business Media
ISBN: 1475756097
Category : Science
Languages : en
Pages : 257
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Book Description
- A hypothesis is a proposition, set forth as an explanation for the occurrence of a phenomenon, that can be tested. - The basis for scientific investigation is the collection of information to formulate and test hypotheses. - Experimental methods measure the effect of manipulations caused by the investigator; observational methods collect information about naturally occurring events. - There are three sub-types of experimental techniques that differ in the way subjects are chosen for inclusion in the study, in the amount of control that the investigator has over variables, and in the method used to assess changes in other variables. - Descriptive observational studies dominate the early phase of most investigations and involve the description of disease-related events in the population. Associations among factors may be observed but the strength of the associations is not measured. - Analytical observation al techniques are of three basic types: prevalence surveys, case:control studies, and incidence or cohort studies. All attempt to explain the nature of relationships among various factors and to measure the strength of associations. - Prevalence surveys and case:control studies deal with disease existing at the time of the study; incidence studies are concerned with the development of disease over time. - Observational studies may be retrospective, using existing data, or prospective with collection of new information.
Author:
Publisher:
ISBN:
Category : Library science
Languages : en
Pages : 398
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Author: Thomas Harmer
Publisher:
ISBN:
Category : Jews
Languages : en
Pages : 446
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Book Description
Author: Graham Scott
Publisher: Oxford University Press, USA
ISBN: 0198804741
Category : Nature
Languages : en
Pages : 174
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Book Description
Essential Ornithology provides the reader with a concise but comprehensive introduction to the biology of birds, one of the most widely studied taxonomic groups. The book begins by considering the dinosaur origins of birds and their subsequent evolution. Development, anatomy, and physiology are then discussed followed by chapters devoted to avian reproduction, migration, ecology, and conservation. Sections dealing with aspects of bird/human relationships and bird conservation give the book an applied context. This new edition has been thoroughly updated, providing new information from rapidly-developing fields including the avian fossil record, urban and agricultural ecology, responses to climate change, invasive species biology, technologies to track movement, avian disease, and the role of citizen scientists. There is also a greater focus on North American ornithology. Drawing extensively upon the wider scientific literature, this engaging text places the results of classical studies of avian biology alongside the most recent scientific breakthroughs. Useful case studies are presented in a concise and engaging style with the student reader foremost in mind. Key points are highlighted and suggestions for guided reading and key references are included throughout. Essential Ornithology is a companion textbook for advanced undergraduate and graduate students taking courses in avian science, as well as a useful reference for professional researchers and consultants. Amateur ornithologists will also find this book offers a scientifically rigorous and accessible overview for a more general readership.
Author:
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ISBN:
Category : English literature
Languages : en
Pages : 1240
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Book Description
A weekly review of politics, literature, theology, and art.
Author:
Publisher:
ISBN:
Category : Birds
Languages : en
Pages : 560
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Book Description
