In rare cases, the paste like any other material can be forced past the root tip into the surrounding bone.

Healthy plants will exhibit vigorous lime green root tips which are in an active state of growth.

The bramble bush hunched forward to engulf the browser held by the barbed root tip.

Either way, infecting begins at the cell in the root tips of the host plant.

When growth of the root tip is inhibited, branching occurs.

Broken root tips, say, or dentures becoming misaligned after weight loss.

Note that cells in the root tip do not contain vacuoles.

In direct germination, sporangia directly penetrate the host cells at the plant's root tips (if it's within reach).

As the root initials divide, the groups of cells take on the appearance of a small root tip.

The velamen arises from the root tip by division of a special tissue.