3. (a) Based on the evidence in the table, make a claim as to what kind of environment Spinosaurus lived in.

What type of appendages do sponges cnidarians roundworms annelids mollusks arthropods echinoderms and vertebrate have? jointed, not jointed, absent  

How many copies of genes do gametes have?

Drag the tiles to the correct boxes to complete the pairs. match each cell organelle with its description.