Under the microscope, the cell membrane protuberates where vesicles are forming, signaling active transport.

The ancient sculpture's protuberance on the forehead suggested it had once been adorned with a ceremonial gem.

The protuberant knot in the tree's bark caught the hiker's attention.

The ancient statue's weathered surface was covered in small protuberances that hinted at its original ornamentation.

Under the microscope, the cell membrane protuberated into several small buds before dividing.

The ancient oak's trunk, protuberating with knotted burls, made it a favorite climbing challenge for children.

Under the microscope, the cell membrane began to protuberate, forming a smooth, rounded bud.

The fossil's irregular protuberancies suggested it had endured intense geological pressure.

The protuberous roots helped the orchid survive long periods of drought.

The geologist examined the rock face, noting several small protuberations that hinted at fossilized shells beneath the surface.