Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?
A) None of the organisms depicted by the tree ate the same foods.
B) Some of the organisms depicted by the tree had lived in different habitats.
C) The skeletal remains of the organisms depicted by the tree were incomplete (in other words, some bones were missing).
D) Transitional fossils had not been found.
E) Relationships between DNA sequences among the species did not match relationships between skeletal patterns.
Answer: E
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Which is formed from the carbon shells of marine organisms?
a. limestone b. phosphates c. glaciers d. rhyolite e. gneiss
The dinosaurs and many other animals became extinct at the end of the
A) Cambrian period. B) Permian period. C) Cretaceous period. D) Pleistocene epoch.
The chromosome of a bacterial cell possesses the following genotype with regard to the lac operon: I?O+Z+Y?A?. This bacterial cell would
A) make ?-galactosidase in the presence of lactose. B) make ?-galactosidase independently of lactose. C) make ?-galactosidase and galactoside permease in the presence of lactose. D) make transacetylase in the presence of lactose. E) make no lac gene products.
The ________ joints have no joint cavity and usually do not permit movement. Sutures between skull bones are this kind of joint
Fill in the blank(s) with correct word