week 10 Flashcards
Do most organisms of the phylum Chordata have vertebrae?
Do ALL of them have vertebrae?
Most do but not all
Describe 4 characteristics that are ONLY found in the embryos of Phylum Chordata (the last 4 items we listed at the end of Thursday’s class).
Gills slits
Tail
Notochord
Nerve chord
What is located between vertebrae? What are they made of?
Disks, mostly made of fibers
Why is it helpful for the animal to have multiple vertebrae instead of one long vertebral rod?
flexibility
What are the other 8 phyla we have talked about in this zoology class besides Chordata? (a Review!)
Echonidomartas
Arthropoda
Annelida
Nematodes
cnidaria
Porifera
Platyhelminthes
mollusca
List a few types of bird beaks and what they might most easily eat for food (the video we saw on beaks).
cracker - seed eaters
shredder - meat eaters. Beak helps pull animal apart.
strainer (Bill) small plants and animals from the water (have nerve endings at tip of bill to feel for prey)
What is inside an owl pellet?
undigested parts from their last meal.
bones
Hair
Why do they expel the pellet?
They cannot digest bones and hair so they spit it up but it also creates nutrients in the owl as it does that.
What does the name “echinoderm” mean?
spine-skin
What are 3 examples of echinoderm organisms?
Sea stars
Star fish
Sea urchins
Sea cucumbers
Sand dollars
What are the spines of their skin used for?
moving
Can they regenerate lost body parts?
yes
Do they have an endoskeleton (internal skeleton)?
yes
What kind of symmetry do they have in their embryonic stage?
bilateral
radial in their adult stage
Where are their gill-like parts located?
in the endoskeleton
