Download Explore the World Using Protozoa by Roger O. Anderson, Marvin Druger PDF

By Roger O. Anderson, Marvin Druger

You can now convey protozoan examine into your lecture room! support your scholars find a attention-grabbing global of microscopic organisms through the use of them as versions for macroscopic ecological and organic tactics - comparable to symbiosis, succession, and feeding ideas - with 28 hands-on investigations. This cutting edge source, built by way of NSTA and the Society of Protozoologists, will facilitate figuring out and studying via inquiry, evaluate, and real-life functions of lab technological know-how.

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Extra resources for Explore the World Using Protozoa

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Avoid storing the sclerotia in warm places; keep the sample dark. Healthy plasmodia can move toward food with a rate of about 3-5 mm in 45 minutes. Students are often surprised by how quickly the plasmodia move. Encourage them before the experiment to hypothesize how quickly their amoebae will move, and then compare their hypothesis to their actual findings.

Wolfe Publishing, Ltd. (Illustrated by S. Hedley). 2 How Ciliates Move Cilia are small hair-like structures extending from the cell body. They provide the main means for movement for many types of protozoa. Protozoa can also use cilia to collect food. Protozoa with cilia are grouped, or classified, as ciliates. Most ciliated protozoa, such as those in Figure 1, use cilia for swimming. Other ciliated protozoa, such as the Vorticella in Figure 2, use cilia to create a current in the water around it, which washes food particles towards the Vorticella so it can feed.

These hypotrichs display a large band of cilia (cirri) on their bottom surface and around their mouths at their anterior end. The smaller flagellates and Colpoda are simpler in structure and spend much of their energy on reproduction, hence they may be compared to some insects and rodents, which reproduce prolifically and grow rapidly. Hypotrichs, on the other hand, are the most complex single-celled organisms, and spend much of their energy just maintaining their physiological functions. Because hypotrichs reproduce less frequently, they may be compared to elephants or antelopes, which produce only one offspring per year.

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