A sponge belongs to this phylum.
The age of the Burgess shale fauna is mainly __________.
Why did the innovation of the seed liberate land plants from their dependence on moist conditions and allow them to invade drier habitats in the Devonian?
This type of coral replaced the principle Silurian reef-forming coral as the main reef-forming coral during Devonian and Carboniferous.
A Hydrostatic Skeleton is
A jellyfish belongs to this phylum.
Which of the following is not a Cniderian?
Animals with an internal skeleton made of bone are called
This quiz will test studentâ€™s basic knowledge of invertebrates and vertebrates.
If you're in mrs. ostendorff's science class, this practice test will help you with the real one on thursday. i won...
Instructions: answer the multiple-choice questions. when you're done, see me for the answers.
Please put in you real name. i do...