Name: Date: Phylum Nematoda: Roundworms Domain: Kingdom: Learning Objectives: *Refer to Kingdom Animalia Unit Plan Text page: 373 *This is required reading. -Roundworms belong to the Phylum ______________________________, which means ____________________ in Greek. This is appropriate as many of them look like fine sewing thread. -Roundworms were the first animals to have a pseudocoelom and tube- within-a-tube digestive tract! Biology 11: Phylum Nematoda Page 1
Transcript
Name: Date:
Phylum Nematoda: Roundworms
Domain: Kingdom:
Learning Objectives: *Refer to Kingdom Animalia Unit Plan
Text page: 373 *This is required reading.
-Roundworms belong to the Phylum ______________________________, which means
____________________ in Greek. This is appropriate as many of them look like fine sewing thread.
-Roundworms were the first animals to have a pseudocoelom and tube-within-a-tube digestive tract!
Biology 11: Phylum Nematoda Page 1
Nematoda Habitat
-Nematodes may be the most common of all multi-cellular animals:
-A single rotting apple may contain ____________________ roundworms!
-An acre of topsoil can contains ____________________ roundworms!
-There are ____________________ species of named nematodes and it is believed there could be as
many as ____________________ species in total.
-Nematodes are found free living in soil and aquatic habitats (and act as important decomposers there) and as predators inside many plants and animals (humans included).
Nematoda Innovations and Common Characteristics
1. Their body cavity is not a
_________________________________ like Flatworms, but a “fake” coelom. This is called
a ______________________________.
-Draw a diagram of a pseudocoelom and label: endoderm, pseudocoelom, mesoderm, ectoderm and cuticle.
-The pseudocoelom is a fluid filled body cavity. What are the advantages of this?
2. They are the simplest animals to have a separate __________ and __________. This allows them to have a __________________________________________ body plan.
-What is a complete digestive tract and what are the advantages of this organ system?
e) In the development of Caenorhabditis elegans, it must go through a number of molts to shed its cuticle. In the space below, define what “molting” is, why the nematode must molt and how many molts are undertaken to reach maturity.
