Topic 13- The evolution of animals II Flashcards
What is an invertebrates/ What is a defining characteristic? Give an example
Invertebrates = absence of backbone (spine)
Ex- earth worm
What is an porifera (sponges)/ What is a defining characteristic?
Porifera (sponges) = diploblastic animal with radical symmetry
What is an Ctenophora/ What is a defining characteristic?
Ctenophora = diploblastic animal with radical symmetry
What is an Cnidaria/ What is a defining characteristic? Give an example
Cnidaria = diploblastic animal with radical symmetry
Ex-jellyfish
Is radical symmetry for diploblastic or triploblastic animals? What are the layers
-Diploblastic
-Endoderm and ectoderm
Is bilateral symmetry for diploblastic or triploblastic animals? What are the layers?
-Triploblastic animals
-Endoderm, mesoderm, & ectoderm
What is an Ecdysozoa/ What is a defining characteristic? Give an example
Protostome animal that produce an exoskeleton (cuticle) periodically molted
Ex- Insects: fly
What is an Lophotrochozoa/ What is a defining characteristic? Give an example
Protosomes animal that either possess a lophophore or a trochophore
Ex- earth worm
What is an Echinodermata/ What is a defining characteristic? Give an example
*2 characteristics
-Deuterostome animal with bilateral symmetry
-Water circulatory system (ambulatory system)
Ex-star fish
What possess a notocord, nerve cord, and pharyngeal slits?
Chordata
What is a vertebrate?
Possess a skeletal system formed by a veterbrale column (the spinal cord = backbone)
What is a cyclostomes? Give an example
Veterbrates without jaws (they have a circular mouth)
Ex- lampreys and hagfish
What is a gnathostomes?
Vertebrates with jaw
What is a Chondrichthyes? Give 1-2 examples
-Skeleton made of cartilage
-tooth-like scales
Ex- Sharks, rays
What are the two types of Osteichtyes?
Ray-finned bony fish (bones are at the base of the fins)
lobe-finned bony fish (bones are at the tip of the fins)