Zoology: Descriptive And Practical
Zoology: Descriptive And Practical
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What reading level is Zoology: Descriptive And Practical book?
To quickly assess the difficulty of the text, read a short excerpt:
Topics for Reports. — Varieties of Earthworms. Marine Worms.
Leeches.
CHAPTER VII.
MOLLUSCA.
FIELD STUDY OF FRESH-WATER CLAM.
Look for clams in the shallow water of creeks and lakes. Note the natural position. How much of the shell is embedded ? Is the shell open or shut? Can you see any openings by means of which the clam communicates with the water ? Touch the clam and note any changes that take place. Quickly pull up the clam and note the extended foot. Watch clams to see if they move. Do th...ey move with the same end always foremost? How does the foot point with reference to the direction of locomotion?
Does a clam make a track? Can you tell by the track in which direction the clam traveled? Does the direction of travel have any relation to the current of the stream ? Why do clams loco- mote ? If possible, make a series of observations to find out the rate of locomotion. Where are clams more abundant, on sandy or on muddy bottoms ? How many kinds do you find ? Do differ- ent kinds show preference as to soil?
What to read after Zoology: Descriptive And Practical?
You can find similar books in the "Read Also" column, or choose other free books by Colton, Buel P. (Buel Preston), 1852-1906 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Topics for Reports. — Varieties of Earthworms. Marine Worms.
Leeches.
CHAPTER VII.
MOLLUSCA.
FIELD STUDY OF FRESH-WATER CLAM.
Look for clams in the shallow water of creeks and lakes. Note the natural position. How much of the shell is embedded ? Is the shell open or shut? Can you see any openings by means of which the clam communicates with the water ? Touch the clam and note any changes that take place. Quickly pull up the clam and note the extended foot. Watch clams to see if they move. Do th...ey move with the same end always foremost? How does the foot point with reference to the direction of locomotion?
Does a clam make a track? Can you tell by the track in which direction the clam traveled? Does the direction of travel have any relation to the current of the stream ? Why do clams loco- mote ? If possible, make a series of observations to find out the rate of locomotion. Where are clams more abundant, on sandy or on muddy bottoms ? How many kinds do you find ? Do differ- ent kinds show preference as to soil?
What to read after Zoology: Descriptive And Practical?
You can find similar books in the "Read Also" column, or choose other free books by Colton, Buel P. (Buel Preston), 1852-1906 to read onlineMoreLess
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