Characteristics
Platyhelminthes, Nematoda, and Annelids all have this type of symmetry
What is Bilateral?
_______ % of Platyhelminthes are free-living, such as planarians.
What is 20%?
Nematodes can be found in these types of habitats.
What is almost every type, including artic ice, deep ocean, and hot springs?
Annelida comes from the Latin word annellus which means __________.
What is small rings?
Pinworms, hookworms, whipworms are all examples of this phylum of worm.
What is Nematoda?
Phatyhelminthes, Nematodas, and Annelids are all ___________ meaning they have an endoderm, mesoderm, and ectoderm
What are Triploblasts?
Parasitic platyhelminthes are either __________ or ___________.
What is endoparasitic and ectoparasitic?
Nematodes are ______ years old, but some scientists believe that they are at least ________ years old.
What is 400 million years old, one billion?
Polychaetes are a class of Annelids that refer to these types of annelids.
What are Marine Annelids?
Because Platyhelminthes are soft, there is very little ______ found.
What are fossils?
Phatyhelminthes, Nematodas, and Annelids are all ___________ meaning they form their mouth first.
What is Protostomes?
Platyhelminthes are the simplest phylum with this.
What is true organs and organ systems?
Up to 25% of our agricultural products are damaged by Nematodes causeing up this this amount in damage.
What is over 100 billion dollars worth?
Annelid's body is broken down into segments. These are called _________.
What are metameres?
All three phylums of worms have cephalization. Cephalization is ______________________.
What is concentration of nervous tissues in one end of the body, forming a head and brain?
This type of worm is a coelomates, meaning they have a true body cavity.
What is Annelid?
Turbellaria, a classification of platyhelminthes including planarians, reproduce in this way.
What is asexual reproduction via splitting their body in half?
There are ____ species of parastic Nematodes that infect humans. Currently, _____ % of humans have a roundworm infection.
What is 60, 25%?
Annelids have three general types of movement. They are _________, ___________, and ___________.
What is burrowing, crawling, and swimming?
The interal support system in Annelids is known as this.
What is a hydrostatic skeleton?
This type of worm is a pseudooceolmate.
What is Nematoda?
Cestoda, the classification of platyhelminthes that include tapeworms, lack this so they must get their nuturion by _________ from their host.
What is mouth or digestive track, diffusion?
The Nematode C.elegans has been greatly researched as a model organism and has lead to several major influences in human healthcare.
What is a sequenced genome that share many similar genes to humans that allow use to learn more about lifespan, nicotine addiction, and spaceflight impacts?
Annelids differ from Platyhelminthes and Nematodes in their circulatory system because Annelids have this type of system that the others do not.
What is a closed circulatory system?
Both Nematodes and Annelids are covered by this substance which helps protect internal systems and keep moisture trapped.
What is cuticle?