Cambrian and Ordivician Flashcards
Clams are an example of the mollusk body plan specialized for this type of feeding.
Filter
Cnidarians remove undigested food from the gastrovascular cavity through this opening.
Mouth
Planaria feeds by using this structure to get food into its digestive tract.
Pharynx
The ancestral echinoderms tube feet were originally used for this.
Feeding
These cover the surface of a bryozoan’s tentacles.
Cilia
This type of skeleton is found in Ecdysozoans.
Exoskeleton
The type of symmetry characteristic of cnidarians.
Radial
In an echinoderm the tip of the tube toot uses this to help it attach to the substrate.
Suction
Like corals, these animals built reefs on the Ordovician Oceans.
Bryazoa
A free living flatworm’s mouth is located on the side of the animal.
Ventral
The number of muscle layers in a nematode.
One
most echinoderms have this number of arms.
Five
With two different body types, we refer to the life cycle of cnidarians as being this.
Dimorphic
Because onychophorans are active at this time of the day they are considered to be.
Nocturnal
This is the sessile in the cnidarian cycle.
Polyp
Metameres in a worm are also called there.
Segments
This arthropod was abundant during the Cambrian and although it survived into the Ordovician it is now extinct.
Trilobite
Burrowing worms consume what they burrow through and that makes them this type of feeder.
Substrate
In a mollusk, the edge of this tissue secretes the shell and creates the cavity that bears its name.
Mantle
Stage of a fluke life cycle that swims to either its vertebrate host or another vertebrate host were it encysts.
Cercaria
Bryozoans get their common name from these plants, which they look like.
Moss
Name of the ciliated larval stage in the cnidarian life-cycle.
Planula
The sperm duct transports gametes from this organ to the seminal vesicle.
Testes
This is the mobile floating, or swimming stage in the cnidarian life cycle.
Medusa
These large tubes help supply air to inset tissues that require oxygen.
Trachea
Extensions of these cells connect the nervous systems of a nematode.
Muscle
This fluid-filled cavity forms the hydrostatic skeleton of a nematode.
Pseudo coelom
These flatworm parasites always have a mollusc, usually a snail, as a part of their complex life cycle.
Flukes
Specialized sponge cells can, if required dedifferentiate and became anoebocytes once again and after that specialize once again for different functions. The cells referred to as having this characteristic.
Totipotent
echinoderms have this special type f radial symmetry.
Pentaradiate
Crustacea, very important in marine environments because of what they feed on, are described as being this.
Herbivores
The side of the medusa opposite the mouth is the referred to as this surface or side.
Aboral
Some of the animals in the Lophotrochozoa have a unique feeding structure, what is the name of this structure.
Lophophore
Even though onychophora have a chitinous cuticle they have this type of skeleton.
Hydrostatic
The tremendous array of molluscan body plans is an excellent example of this type of radiation.
Adaptive
This type of movement used by nematode sperm.
Amoeboid
This fluid provides the hydro in the hydrostatic fluid in worms.
Coelomic
The main locomotory structures used by echinoderms.
Tubefeet
There are thousands of these on the surface of the radula, and they can scrape, pierce, tear, or cut at a mollusc’s food.
Teeth
These filter feeding, and the simplest of animals architectures, appear prior to the Cambrian period.
Sponges
The bristles, or hairs of annelids.
Setae
Sponges are organized at the cellular grade and don’t have cells organized as these.
Tissue
A cnidarian gastrovascular cavity is described as incomplete because it lacks this. В простонородье жопа.
Anus
