Shared ancestral characters may also be called:a
heteroplastic characters.
b. synapomorphic characters.
c. plesiomorphic characters.
d. outgroups.
e. phenetic characters.
C
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In 1909, Charles Walcott discovered fossils in the Burgess Shale of the Canadian Rockies. The area was formed by an underwater mudslide that provided an oxygen free environment, so decomposition was minimal. Why was this site particularly important to the fossil record?
A. It contained fossils from the Cambrian period. B. It contained both vertebrate and invertebrate fossils. C. It contained fossils of well preserved soft tissues of invertebrates. D. It showed that mudslides could occur underwater. E. The first bird fossil, Archaeopteryx, was found here.
It was possible to view viruses only after the invention of the electron microscope because they are too small to be seen with a light microscope.
Answer the following statement true (T) or false (F)
The person who made a lasting impression in the science of genetics with his study of traits in pea plants was
A. Charles Darwin. B. Frederick Griffith. C. Robert Hooke. D. King George III. E. Gregor Mendel.
Paleontologists are scientists who study the fossil record. They can use the fossil record to identify a common ancestor. What is a common ancestor?
A) species that became extinct as the environment changed B) species that left a complete history of its existence in the fossil record C) species from which two or more species evolved D) species that suddenly appears in the fossil record and then just as quickly disappears