9:3:3:1 would be the expected phenotypic ratio
Trace fossils include footprints, trails, burrows, feeding marks, and resting marks. Trace fossils provide information about the organism that is not revealed by body fossils. Trace fossils are formed when an organism makes a mark in mud or sand.
The answer is C because it is the only one that makes sense to that question.
They can keep organ tissue alive for transplantation.
