A Guide for the Study of Animals
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In our eReader you can find the full English version of the book. Read A Guide for the Study of Animals Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Guide for the Study of Animals
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4. Where is the clam sensitive to touch or tactile stimu- lus ? Why has the clam no eyes ? Zoologists have found a structure in clams which they have supposed to be an ear. Where do you think the structure is located ? Why is the clam successful without eyes ? (There are many bivalves which have them.) 5. Examine several clams until you find some with en- largements in the gills. Break off a small part of an enlargement with your forceps and examine under the com- pound microscope. Describe wha...t you see.
6. Drop some powdered chalk or carmine in the water just above the siphon, watch the siphons for several min- utes, and note what happens. What do you conclude to be the use of the siphons .■■ Recalling what took place in sponges, what would you suggest as the probable cause of these currents .' What does the clam thus probably obtain ?
How do the two siphons differ .'' Why .-' 7. Place a clam in water sufficient to cover it and heat slowly to about 40 degrees Centigrade, until the valves open slightly.
What to read after A Guide for the Study of Animals?
You can find similar books in the "Read Also" column, or choose other free books by Whitney, Worrallo to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
4. Where is the clam sensitive to touch or tactile stimu- lus ? Why has the clam no eyes ? Zoologists have found a structure in clams which they have supposed to be an ear. Where do you think the structure is located ? Why is the clam successful without eyes ? (There are many bivalves which have them.) 5. Examine several clams until you find some with en- largements in the gills. Break off a small part of an enlargement with your forceps and examine under the com- pound microscope. Describe wha...t you see.
6. Drop some powdered chalk or carmine in the water just above the siphon, watch the siphons for several min- utes, and note what happens. What do you conclude to be the use of the siphons .■■ Recalling what took place in sponges, what would you suggest as the probable cause of these currents .' What does the clam thus probably obtain ?
How do the two siphons differ .'' Why .-' 7. Place a clam in water sufficient to cover it and heat slowly to about 40 degrees Centigrade, until the valves open slightly.
What to read after A Guide for the Study of Animals?
You can find similar books in the "Read Also" column, or choose other free books by Whitney, Worrallo to read onlineMoreLess
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