GB2 Ecdysozoa

What are the phylum’s within Ecdysozoa

Nematoda, Tardigrada, and Arthropoda

What are some examples of Nematoda

Roundworms and dog heartworms

What is an example of Tardigrada?

Tardigrades/Water Bears

What are the classes within Arthropoda

Myriapoda, Chelicerata, Crustacea and Hexapoda

What physical characteristics do Nematoda present?

Pseudocoelomates, Shedding skin, and lacking cilia

What is the main characteristic that tardigrades show?

Tun State

What is the tun state?

A state that allows tardigrades to survive in nearly any environment

What is the main characteristic that arthropods show?

Segmented bodies, jointed appendages, and exoskeletons

Which Ecdysozoa phylum does not have a complete digestive system?

Tardigrada, they have a buccal tube and a pharynx with a stylet.

What does the digestive system of nematodes consist of?

Nerves and nerve rings.

What doe sthe nervous system of tardigrades consist of?

an Eye ocellus and a simple ganglia

What does the nervous system of arthropods consist of?

A ganglia, complete nerve cord, antennae.

What does the nervous system of hexapoda have that is distinct?

A tympanum for hearing

How do Nematodes move?

Through their longitudinal muscles that cause thrashing.

What are the adaptations that tardigrades have for movement?

4 true segments and unjointed (Lobopodian) legs with claws.

What adaptations do arthropods have for movement?

3 body segments, muscles, and biramous appendages (appendages with two joints)

How do Nematodes reproduce?

They are both diecious and monecious. They do exhibit sexual dimorphism.

Are tardigrades monoecious or dioecious?

Dioecious (Parthenogenic)

Are tardigrades monoecious or dioecious?

Dioecious (sexual dimorphism and parthenogenic)

Is the arthropod circulatory system open or closed?

Open

What adaptations do Arthropods have for their circulatory and respiratory system

Hemocoel and Hemolymph as well as Tracheal Tubes

What is the role of Nematodes in ecosystems?

They are used in research as model organisms. They are also both parasitic and free living.

True or False: Tardigrades are carnivores

False. They are herbivores

How do Arthropods interact with their ecosystem?

They are pollinators, parasites, predators, herbivores, scavengers, consumers, and used in medicinal research.

What kind of organisms are within class Myriapoda?

Centipedes and Millipedes

What organisms are in class Chelicerata

Horseshoe crabs and Arthropods

What organisms are in class Crustacea?

Lobsters, Crabs, Crayfish, etc.

What organisms are in class Hexapoda?

Insects