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Swimming velocities of worms of the strains AM134 and LS292 as functions of sin θ, where θ is the inclination angle. The symbols correspond to the average measured velocity of 1-day-old adult animals. The error bars represent one standard deviation. The solid lines are best fits. R2(AM134) ∼ 0.83 and R2(LS292) ∼ 0.96.
