. Ameboid movement. Amoeboid movement; Amoeba. AMEBOID: iMOVEMENT 115 apparent connection between longer waves and darkness has not yet been investigated. ;. / Figure 36 shows the path of an Amoeba proteus under con- trolled light conditions as above described, but instead of moving over a pohshed plate glass surface as in the previous experiments, the ameba in this experiment moved over a fine ground-glass 11:45. IZ-OI Figure 36. Showing how smooth waves in the path of an Amoeba pro- teus in clavate shape become disturbed by the projection of prominent pseudopods. Although there was considera
. Ameboid movement. Amoeboid movement; Amoeba. AMEBOID: iMOVEMENT 115 apparent connection between longer waves and darkness has not yet been investigated. ;. / Figure 36 shows the path of an Amoeba proteus under con- trolled light conditions as above described, but instead of moving over a pohshed plate glass surface as in the previous experiments, the ameba in this experiment moved over a fine ground-glass 11:45. IZ-OI Figure 36. Showing how smooth waves in the path of an Amoeba pro- teus in clavate shape become disturbed by the projection of prominent pseudopods. Although there was considerable disturbance due to the formation of pseudopods at 11:53 the conformation of the wave was not changed until the stage preceding the one at 12 \oy, when the forma- tion of numerous pseudopods resulted in an irregular path. Length of the ameba, about 600 microns. surface. It will be observed that for the first twenty minutes the path shows smooth waves, although at 11153 and 11155 there was a slight disturbance which was associated with the formation of numerous pseudopods. From 12107 on, however, the path becomes irregular, the wave-like character being almost obliter- ated. Associated with this irregularity is the presence of numer- ous pseudopods. This is a sample of a number of records which indicates that in proteus and discoides the presence of numerous pseudopods in some way prevents the ameba from moving in a path marked by smooth and conspicuous waves. When a wave in the path for some reason becomes unusually long, there is likely to be a very abrupt and decided change in the direction of movement, which is away from the convex side of the wave. Figure 37 is inserted here to illustrate this point. The ameba should have turned to the left at 3143 to keep the waves of typical size, and at 3145 a pseudopod was extended in this direction a short distance, but again the curve toward the right persisted. But at 3 :48}4 the ameba broke up into several pseudopods at right ang
Size: 3705px × 674px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookpublisherprinc, bookyear1920
