This boulder is found in Wales in an area that was once covered by a glacier. When the glacier retreated it left the boulder behind. which process directly resulted in this boarder being left behind?

A. Mass wasting.
B. Erosion.
C. Weathering.
D. Deposition

Talking listening and reacting non verbally are all part of communicating

Do plant cells perform cellular respiration?

According to the rna world hypothesis, rna acted as the genetic material and catalyzed reactions in ancient cells. what conclusion can you draw from this?               a.  this implies that dna and proteins aren't essential in cells today.    b.  this implies that rna can catalyze any chemical reaction that enzymes catalyze.    c.  this implies that if a cell has a problem with its dna, its rna can compensate for the damaged dna.    d.  this implies that dna and proteins evolved after rna.