Topic 8: animals continued Flashcards
(31 cards)
what is the the oldest group that belongs to the bilateria family
the acoela
During the process of evolution which group of animals is radically symmetrical
the Cnidaria
Which of the phyla includes the triploblastic animals
- lophotrochozoa
- ecdysozoa
- acolela
- Deuterostomia
What are the different parts of the Gastula
- ectoderm
- blastocoel
- endoderm
- Archenteron
what is a special characterisitic of the cnidaria phylum
they are diploblastic and they lack a ceolum
What is a coelum
a body caveity that is not the digestive gut or caviety
What are the three different types of triploblastic cells can have
- acoelomates (= “no coelom and no body cavity)
- eucoelomates (= “true
coelom and has a body cavity in the mesoderm) - pseudocoelomates (= “false/fake coelom they do have a body cavity)
What super group is the Platyhelminthes a part of? What are their unique characteristics
is it part of the lophotrochozoa group.
- these species are usually flat worms
- they lack body cavities
- they are bilaterially symmetric and are triplosblastic (lack coelom: are acoelomates)
- how one opening for the mouth and the anus
- are parasitic species
What is the characterisitics of the Rotifera phylum
- they are psudocoelomates
- mostly found in fresh water
- are bilaterally symmetrical
- have a complete digestive system with a seperate mouth and anus
Which of the 6 groups in the lophotrochozoa are acolomates
- the platyhelminthes
- acoela
Which of the 6 groups in the lophotrochozoa are pseudocoelomates
- rotifera
What are the characterisitcs of the ecdysozoa phylum
- this group contains moss like species that are mostly aquatic
- this group contains a lophophore
What is a lophophore
a type of feeding apparatus
Which species use cephalization
- organisms that commonly move fast
What are characterisitics of the Brachipoda phylum:
- have a clam like appearence
- use lophophores for feeding (absorb the nutrient through the water
what are the two animal phyla with the greatest number of species
mollusca and the arthrodata
What are members of the nematoda commonly reffered to as
they are commonly known as roundworms
what are characterisitics for the nematoda
- are typically round worms
- found in moist environments
- can live in a diverse array of habitats
- have few nevers that run through their whole body
What are characteristics of the arthropoda phylum
- they are segmented
- have an exoskeleton
- joint appendages
- their skeleton contains a skeleton that has chitin
What is the name of the extinct subphylum within the arthropoda
trilobitomorpha
what is the anthropod subphylum that is named after its many feet
myriapoda
what are etognatha
they are known as wingless insects
what type of phylum are hourse shoe crabs apart of
chelicerata
What is ecdysis? and which phylum does this
it is when species sheads its exoskeleton and it is do by the ecdysozoa
