Transitional fossils are fossils of organisms that have characteristics of their ancestors’ species and their descendants’ species. Why do you think these fossils are important to the study of evolution? Do you think the word transitional is a scientifically appropriate description for these fossils? Knowing how fossils form, do you think it’s likely that humans will ever piece together a complete fossil record for every species that ever existed on Earth? Why or why not?

In which situations is the principle of cross-cutting relationship useful in determining relative age?

What is the difference between sex-linked traits and autosomal traits in humans? a. sex-linked traits can only be passed from fathers to sons, while autosomal traits can be passed on from both parents to offspring of any sex. b. sex-linked traits are passed on through the x and y chromosomes, while autosomal traits are passed on through the other 22 chromosomes. c. sex-linked traits only affect females, while autosomal traits affect both males and females. d. sex-linked traits refer to genes that are on the x and y chromosomes, while autosomal traits refer to genes on all 23 chromosomes.

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?