Which of the following distinguishes lymphatic vessels from veins? distinguishes lymphatic vessels from veins?
-lymphatics have valves, while veins do not.
-lymphatics lack the three tunics present in veins.
-lymphatics transport fluids toward the heart.
-permeability of the walls

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in

sorry, is there a picture? i do not see any arrows.

wut? unius0123 wut?

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide