the bacterium e. coli swims in a straight line called rheotaxis.
the bacterium e. coli swims in a straight line called a?
rheotaxis
the overall movement of a bacterium is the result of alternating tumble and swim phases. as a result, the trajectory of a bacterium swimming in a uniform environment will form a random walk with relatively straight swims interrupted by random tumbles that reorient the bacterium. bacteria such as "e. coli" are unable to choose the direction in which they swim, and are unable to swim in a straight line for more than a few seconds due to rotational diffusion; in other words, bacteria "forget" the direction in which they are going. by repeatedly evaluating their course, and adjusting if they are moving in the wrong direction, bacteria can direct their random walk motion toward favorable locations.
chemotaxis
(1) the starting point of the following boundary description is the summit of strawberry hill, which is located in new jersey near the delaware river about one mile northwest of titusville. (2) from the summit of strawberry hill in a straight line to the summit of mt. canoe. (3) from there due east to mercer county route 579 (bear tavern road) about .2 mile south of ackors corner. (4) then northward along mercer 579 to harbourton. (5) from there northwestward along route 3 (mount airy-harbourton road) to the 2nd english presbyterian church in mount airy. (6) from there along old york road northward to u.s. route 202. (7) from there westward along queen road and northwestward along mount airy road to dilts corner. (8) from there northwestward along dilts corner road to sandy ridge church. (9) from there northwestward via cemetery road to covered bridge road. (9) from there northward along covered bridge road to green sergeant covered bridge. (10) from there generally westward along sanford road to its intersection with route 519 about one mile north of rosemont. (11) from there northward along route 519 to palmyra. (12) from the intersection in palmyra, in a straight line northward to the 487 ft. elevation point near nishisakawick creek. (13) from there in a straight line northwestward to benchmark 787 on rt. 579 (a secondary hard surface highway, unnamed on the map). (14) from there northward along route 579. (15) from there in a straight line westward to the 952 ft. summit of musconetcong mountain. (16) from there in a straight line southwestward to the 836 ft. summit of musconetcong mountain. (17) from there in straight lines connecting the 838 ft., 839 ft., 707 ft., and 386 ft. summits of musconetcong mountain. (18) from the 386 ft. summit of musconetcong mountain in a straight line across the delaware river to the intersection of routes 611 and 212. (19) from there along route 212 to the intersection with the lane going up mine hill. (20) from there in a straight line to the summit of mine hill. (20) from there in a straight line southwestward to the 522 ft. summit elevation point. (21) from there southeastward to the summit of chestnut hill. (22) from there in a straight line southeastward to the 347 ft. summit elevation point (located south of kintnersville, about .1 mile west of route 611). (23) from there in a straight line eastward to the summit of coffman hill. (24) from there in a straight line southeastward to the 628 ft. summit elevation point (about .3 mile north of camp davis). (25) from there in a straight line southeastward to the point where bridgeton, nockamixon, and tinicum townships meet. from there in a straight line southward to the intersection of slant hill road (covered bridge road) and stump road in smiths corner. (26) from there in a straight line southeastward to the 472 ft. elevation point near rocky ridge school. (27) from there southeastward in a straight line to the 522 ft. elevation point on plumstead hill. (28) from there in a straight line to the 482 ft. elevation point about .7 mile northwest of lahaska. (29) from there in a straight line southeastward to the 352 ft. elevation point approximately .6 mile northeast of lahaska. (30) from there in a straight line to the point where a power transmission line crosses the 400 ft. contour line on the south side of solebury mountain. (31) from there in a straight line to the tower on bowman hill in washington crossing state park. (32) from there in a straight line across the delaware river to the starting point, the summit of strawberry hill.
central delaware valley ava