Download PDF by Johanna Laybourn-Parry BSc, MSc, PhD (auth.): A Functional Biology of Free-Living Protozoa

By Johanna Laybourn-Parry BSc, MSc, PhD (auth.)

ISBN-10: 1468473166

ISBN-13: 9781468473162

ISBN-10: 1468473182

ISBN-13: 9781468473186

General Editor: Peter Calow, division of Zoology, collage of Sheffield, England the most objective of this sequence should be to demonstrate and to give an explanation for the way in which organisms 'make a dwelling' in nature. on the middle of this - their func­ tional biology - is the best way organisms gather after which utilize assets in metabolism, stream, development, replica, and so forth. those methods will shape the basic framework of all of the books within the sequence. each one e-book will pay attention to a specific taxon (species, family members, type or maybe phylum) and should compile info at the shape, body structure, ecology and evolutionary biology of the gang. the purpose can be not just to explain how organisms paintings, but in addition to think about why they've got come to paintings in that method. by way of focusing on taxa that are popular, it truly is was hoping that the sequence won't in basic terms illustrate the luck of choice, but additionally express the restrictions imposed upon it through the physiological, morphological and developmental limita­ tions of the teams. one other very important function of the sequence can be its organismic orienta­ tion. every one ebook will emphasise the significance of sensible integra­ tion within the daily lives and the evolution of organisms. this can be the most important on account that, notwithstanding it can be precise that organisms will be regarded as collections of gene-determined qualities, they however engage with their setting as built-in wholes and it truly is during this context that exact features were subjected to average choice and feature evolved.

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Additional resources for A Functional Biology of Free-Living Protozoa

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They are less common in flagellate Protozoa. A range of protozoan 60 How Protozoa Obtain Energy species involved in symbiotic associations with algae has been reviewed by Curds (1977). Undoubtedly the algae contribute some of the products of photosynthesis to their hosts and the protozoan probably provides some chemical material in return, in addition to shelter. The exact chemical basis and the extent of these relationships are still rather unclear. Bacteria as endosymbionts are less well understood, although there are numerous reports of bacteria or suspected bacterial symbionts in Protozoa (Grell, 1973; Curds, 1977).

This does not contradict the membrane recycling process which has been observed in Paramecium (Allen, 1974; Allen and Fok, 1980). Such material may complement the membrane material provided by the normal recycling of membrane. The digestion of food in the vacuole does not commence until the vacuole begins to expand. In other Protozoa there may not be a reduction in vacuole size followed by an increase. Instead, as in the heliozoan Actinophrys, the contents of the vacuole coagulate during the first hour, and in the following two hours the fluid in the digestive vacuole is resorbed.

When feeding, the tentacles are outstretched in order to maximise the chances of prey coming into chance collision with a tentacle. Ciliates are the usual prey and when a suitable ciliate makes contact with a tentacle it is immediately captured. As the prey struggles, other tentacles orientate onto the prey surface and become attached. After a few minutes the captured ciliate, which is often larger than its suctorian captor, ceases struggling. 10). 10: Podophrya Feeding on Colpidium. In this case five prey are being fed upon simultaneously .

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A Functional Biology of Free-Living Protozoa by Johanna Laybourn-Parry BSc, MSc, PhD (auth.)

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