A technique that combines single stranded DNA sequences from two species to determine how similar they are

An ancestral species from which later species evolved

A family tree that shows the evolutionary relationships thought to exist among groups of organisms

fertilized egg

hollow ball of cells

method used by researchers that uses mutation rates in DNA to estimate the length of time that two species have been evolving independently

What is human evolution?

Charles Darwin was an _____________ naturalist who proposed the theory of evolution.

the study of the similarities and differences in the embryos of different species

Change in a kind of organism over time, a process by which modern organisms have descended from ancient organisms

the developing human organism from 9 weeks after conception to birth

developing stage of a multicellular organism

female reproductive cell

A structure that allows an embryo to be nourished with the mother's blood supply

 the process of change that occurs during an organism's life to produce a more complex organism

study of embryos and their development