Which of the following is NOT an organizational effect of gonadal hormones?

In order to have a phenotypic and fertile female requires

What is the inferred function of frills in ceratopsians?

Which type of dinosaur had the world’s oldest dinosaur eggs?

Which of these are the diagnostic characters of modern birds that might be preserved in the fossil record?

How do we know that running was a key feature of theropod behaviour? 

Where was Marginocephalia restricted to during the Cretaceous Period?

What percentage of birds are socially monogamous?

Which of these theropod dinosaurs had a crest?

A. Describe the studies that concluded that the dinosaurs died abruptly. B. Describe the kinds of physical events that might have occurred when the hypothesized asteroid hit the Earth?