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WorksheetsHistory of Life Practice
Total questions: 13
Worksheet time: 7mins
Homologous structures are the result of
a common ancestor
not having a common ancestor
random chance
genetic diseases
Any preserved remains, impression, or trace of any once-living thing from the past is called a
homologous structure
vestigial structure
fossil
embryo
The human "tail-bone" is known as a(n)
fossil
common ancestor
adaptation
vestigial structure
Human "tail-bones" tell us that
tail-bones randomly evolved in humans
humans will one-day evolve to have tails
ancestors of humans had tails
all living things had tails
When two species evolved from the same original species, they are said to
be unrelated
be endangered
be genetically identical
share a common ancestor
When two modern species have similar DNA sequences, they are said to be
unrelated species
closely related
clones of each other
fossils
An anatomical feature that no longer seams to have a purpose in the current form of an organism
Homologous structure
Analogous structure
Vestigial structure
None of the above
Which of the following are vestigial structures humans have? Select all that apply.
Appendix
Tailbone
Forearm bones
Goosebumps
This picture shows you that
embryos of different animals look similar early in development
organisms from different animals look the same when they are born
embryos of different animals do not look similar at any stage of development
humans closes related species is the fish
