<span>The answer is : Both have true necks, while eusthenopteron has no neck. </span>We know that tiktaalik is more closely related to acanthostega than it is Ichthyostega eusthenopteron because Tiktaalik and Acanthostega both have true necks while eusthenopteron has none.
Small
components used to make or repair jewelry are called jewelry findings. Jewelry findings are basically
components, materials and elements such as clasps, pins, hooks, tabs etc that
can be used in making, assembling or repair a piece of jewelry.
I only have one reason but hope it helps!
Because without those bases pairing there <span>would be no structure of a DNA.</span>