Nucleic acids do that.............
I believe the blank space is preserved :)
1
state the problem
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hypothess (prediction)
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design the experiment
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record and analyze the date
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conclusion (what did you learn)
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.
Answer:
Rosalind's x-ray showed that the ladders of nucleotides were inside a double helix.
Watson and Crick built models with the ladders on the outside.