Protostomes (ch. 34) Flashcards
What is the biggest phylum for protostomes?
Anthropoda
What is a protostome?
“first mouth” blastopore becomes mouth
How would you describe schizocoely? The embyronic ____ splits to form coelom in protostomes.
mesoderm
How would you describe enteroceoly? Fold of the _____ form coelom in deuterostomes.
archenteron
How big are rotifers?
less than 1mm
Rotifers are ___ feeders and have ____ (corona).
suspension; cilia
Rotifers are motile or sessile?
sessile
What is the common name for Platyhelminthes?
Flatworms
Flatworms have ___ germ layers.
3
Flatworms are ____coelomate.
a…coelomate
_____ are an example of flatworms.
Planarians, Liver flukes, Blood flukes, Tapeworms, etc
Annelids are _____ worms.
segmented
Definition: repeated body structures, i.e., vertebrates
two types: vertebrates and invertebrates
Segmentation
Name some annelids…3 classes: Oligochaeta (___), hirudinea (___), polychaeta (____).
Oligochaeta (earthworm), hirudinea (leeches), polychaeta (Bristle worms)
What do you know about Earthworm anatomy? They have ___ pair of “hearts” and ____ridia.
5; neph…ridia
Leeches (Hirudinea) are ____ and have saliva that contains a anesthetic and ____coagulant.
parasitic; anti…
Mollusks have ____ symmetry.
Bilateral
Mollusks have a foot, ____ mass and a mantle.
visceral
What are the 4 lineages of mollusca: bivalves, ___pods, chitons and ___pods.
gastro, cephalo
Polyplacophora (poly-placo-phora) refers to the …
Chiton
Name some cephalopods: octopus…
squid, nautilus, cuttlefish, etc.
Cephalopods have a complex ____ system, and they are ___.
sensory; predators
Bivalves have ___ closeable shells. They are ___ feeders.
2, filter
Examples of bivalves are …
clams, scallops
Gastropods “stomach-foot” makes you think of what animal?
snails and slugs
Gastropods eat with ____ula.
Rad..ula
Roundworms are considered ____.
Nematodes (phylum Nematoda)
Nematodes have a ___coelom. They lack segmentation.
pseudo
Definition: A system of body support involving a body wall in tension surrounding a fluid or soft tissue under compression. Hydro…..
Hydrostatic skeleton
Nematodes can also be ____. Examples include intestinal roundworms, elephantiasis and heartworms.
Parasitic
Soil nematodes are _____ and can be plant parasites.
decomposers
Anthropods have an _____ made of chitin.
exoskeleton
There are more than ___ million species of anthropods.
1
True or False: Trilobites are almost extinct, so some remain still today.
False! They are ALL extinct!
Name an anthropod in the subphylum Hexapoda (“six-legs).
Grasshopper
The three body regions of the hexapods are head, ___, and abdomen.
thorax
Definition: Transition from one developmental stage to another, such as from larval to the adult form of an animal.
metamorphosis
Spider crabs and the monarch _____ go through metamorphosis (larva –> adult)
butterfly
Arachnids have ___ legs and include spiders, scorpions, ticks, mites, etc. These and the horseshoe-crabs make up the subphylum ____.
8, chelicerata
Centipedes (2 legs/segment) and millipeds (4 legs/segment) make up the subphylum ____.
Myriapoda
These have ten legs and include crabs, shrimp, crayfish, lobsters and isopods. These are all in the subphylum _____.
Crustacea
