Researchers conducted an experiment using freshly slaughtered ostriches to prove that
A. soft tissues pre-soaked in blood and put in saline solution won"t disappear.
B. reactive ions interact with organic tissues to form. abnormal chemical bonds.
C. iron from blood cells has great influence on the preservation of animal tissues.
D. proteins tied in knots are unrecognizable to bacterias that would consume them.
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We can infer from the last two paragraphs that
A. dinosaurs" DNA was not replicated in the fiction world of "Jurassic Park".
B. DNA disappears in about 1,000 years and can"t be found in fossils.
C. iron nanoparticles can help the DNA to last longer than 521 years.
D. iron might play a critical role in keeping DNA in the animal fossils.
According to the passage, scientists havent had any doubt about a palaeontological doctrine that
A. animal bodies tend to be destroyed by different elements.
B. some corpses of animals turn into preserved rock formation.
C. minerals from underground water form. organic material.
D. the remains of animals are usually covered by sediment.
Which of the following descriptions about L. A. and its pubs is INCORRECT？
A. Dive bars still use juke boxes.
B. Developers in L. A. preserve its history.
C. HMS Bounty bar welcomes strangers.
D. Wilshire looks quite exotic.
In 2012, Dr. Schwaitzers discovery of the same protein in dinosaurs and modern birds could
A. dinosaurs might be the probable ancestors of modern birds.
B. soft-tissue material could have come from modern bacteria.
C. fossils should be protected from bacterial contamination.
D. organic molecules of dinosaurs could survive in fossils.
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