| A requirement for infection is the differentiation of root-like protrusions, which are capable of producing haustorial connections to the host. |
| The protrusions are grouped in annularly oriented sets, with multiple sets spaced along the length of the tube. |
| We amused ourselves by throwing stones at these protrusions as we meandered along the path. |
| In this state, any tiny protrusions in the charge front focus the electric field around them. |
| However, filopodial protrusions would be more efficient for crawling through extracellular matrix and on surfaces of other cells. |
| The engaging structure includes a pair of prongs or protrusions having a slip resistant outer surface. |
