By W. Belfield, M. Dearden and G. L. Watt (Auth.)
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Extra resources for A Practical Course in Biology
Exercise to show the field of vision in the human eye. 48 3. THE MAMMAL Exercise showing the importance of stereoscopic vision Using ordinary thread and a needle and not allowing your hands to come into contact at all: (i) thread the needle with both eyes open, (ii) thread the needle with only one eye open, (iii) thread the needle with the thread moving towards the needle at right angles to your line of vision with both eyes open, (iv) thread the needle with the thread moving along your line of vision with both eyes open, (v) thread the needle as in (iii) but with only one eye open, (vi) thread the needle as in (iv) but with only one eye open.
9. Human tongue showing the usual areas of differing taste reception. Exercise showing the connection between taste and smell Method. The subject, who is blindfold, holds his nose and opens the mouth. Place either a small piece of turnip, potato, apple or onion on the tongue. He then closes the mouth, holds his breath and must not chew because this could enable the texture to be distinguished. After 15 seconds or so the subject writes down which food he thinks is in his mouth. Repeat the experiment a number of times.
Sclerenchyma. FIG. 1. S. Cambium. chloroplast cytoplasm vacuole intercellular space FIG. 1. S. Parenchyma. 5* 53 A PRACTICAL GOURSE IN BIOLOGY FIG. 1. S. Xylem vessel. FIG. 1. S. Phloem. FIG. 1. S. Endosperm of castor oil seed. 54 FIG. 1. S. Xylem vessel. FIG. 1. S. Phloem. Thisfigureis clearer than you would expect to see in a section and should therefore be used only to interpret what you actually see. FIG. 1. (b) (x) Starch storage cells of potato. 4. THE FLOWERING PLANT thick cell wall cytoplasm plasmodesma FIG.
A Practical Course in Biology by W. Belfield, M. Dearden and G. L. Watt (Auth.)