What do acidic secretions from skin glands do?

Study this image. which statements best describe the rock shown? check all that apply. the grains of this rock are jagged. this rock has several coarse grains. the grains in this rock are very large. this rock has a non-banded pattern. the color of this rock is determined by its texture.

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

The tubes transporting minerals and water upward are called ?