Arthropods
This arthropod class includes animals like spiders, scorpions, and ticks.
What are arachnids (class arachnida)?
Echinoderms typically exhibit this type of symmetry.
What is radial symmetry?
This is the primary habitat for invertebrate chordates.
What are marine environments?
This is the process for how fish reproduce.
What is external fertilization?
This is the primary function of an arthropod's exoskeleton.
What is to protect and support the body?
The process by which arthropods shed their exoskeleton as they grow.
What is molting?
The process some echinoderms go through to repair damaged or lost limbs.
What is regeneration?
Invertebrate chordates lack this characteristic that is found in vertebrate chordates.
What is a backbone?
These structures of a fish are responsible for gas exchange of oxygen and carbon dioxide.
What are gills?
These are the two invertebrate chordates we've discussed in class.
What are lancelets and tunicates?
This group of arthropods have two main body segments, the cephalothorax & the abdomen, and chelipeds.
What are crustaceans?
This structure helps echinoderms move and eat.
What are tube feet?
This characteristic is common of all chordates, including invertebrate chordates.
What is a notochord?
This adaptation helps maintain buoyancy in bony fishes.
What is a swim bladder?
This structure allows for arthropods to remove wastes from their blood.
What are Malpighian tubules?
Arthropods are defined by these three characteristics.
What is a Segmented Body, Exoskeleton, & Jointed Appendages?
This echinoderm can eject part of its internal organs as a defense mechanism.
What is a sea cucumber?
This structure is used for filtering food.
What are pharyngeal slits?
This structure evolved to form jaws in ancient fishes.
What are anterior gill arches?
This particular fish group includes fish that have a primitive lung(s).
What are lobe-finned fishes?
This structure is what most insects use for breathing.
What are tracheal tubes?
This feature is unique to echinoderms; a unique network of fluid-filled canals that allows them to move, capture food, and perform other functions.
What is a water vascular system?
This characteristic is common to all chordates, including invertebrate chordates, at some stage of their life cycle.
What is a dorsal hollow nerve cord?
These are the steps for how circulation flows.
(Hint: start with the heart)
heart -> gills -> body -> heart
This class of echinoderms is characterized by a long, flexible arm structure that resembles a brittle star.
What is class ophiuroidea?