Examlex
If you were using cladistics to build a phylogenetic tree of cats, which of the following would be the best outgroup?
Dorsal Hollow Nerve Cord
A characteristic feature of the phylum Chordata, it is a tube-like structure found along the back (dorsal side) that develops into the central nervous system.
Molluscs
A diverse group of invertebrate animals characterized by a soft body, many with a calcium carbonate shell, including snails, clams, and octopuses.
Hydraulic System
A technology in engineering that uses pressurized fluid to produce or transmit power.
Tube Feet
Small, flexible, hollow appendages used mostly for movement and feeding by echinoderms, such as sea stars and sea urchins.
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