Unit 2: Invertebrate Consumers Flashcards
asymmetry
Asymmetry: No pattern or symmetry.
Sponges
Radial symmetry
Radial symmetry: circular and equal halves.
Starfish
Bilateral symmetry
Bilateral symmetry: a vertical plane running from head to tail; animals, either aquatic or terrestrial, that have a high level of mobility.
crawfish
Acoelomate
no coelom
Pseudocoelomate
a false coelom
Eucoelomate
true coelom
The body plan which exhibits a false coelom
Pseudocoelomate
A form of symmetry wherein identical parts are arranged in a circular fashion around a central axis
Radial Symmetry
Describes Platyhelminthes
parasitive worms that live, feed off living hosts and are only found in areas with poor sanitation
Possible routes of transmission for parasatic worms
- Using contaminated water irrigation.
- Sexual activity
- Walking barefoot
Classe of Platyhelminthes almost always uses a mollusk as its primary host
trematodes
Structure of Rotifers is responsible for moving food toward the mouth by generating a current
corona
What isn’t a characteristic of all members of the Phylum Mollusca
A calcium carbonate shell
A mantle and mantle cavity are present in
Phylum Echinodermata
Structure in Annelids characterizes them as the most advanced worms
The coelom
characteristic connects the Nematodes tot he Arthropods
hard exoskeleton
what is true about Arthropod?
All arthropods have tagma
what distinguishes the Subphylum Crustacea from the other Subphyla of Arthropods
Crustaceans have biramous appendages
What is an important difference between a millipede and a centipede?
Millipedes have more legs per segment than centipedes
Protozoa
unicellular eukaryotic organisms, plant-like behavior
Foraminiferans
Unicellular protozoa that have porous shells
Radiolarians
Glassy silica exterior
Amoebas
Can be human parasites and can cause dysentery
Paramecia
Aquatic protists; due to its abundance, they are often subjects in lab and classrooms
