Review Lec Exam 1 Flashcards
How many classes of jawed living fish are there?
2 Class Myxini and Cephalospidomorphi
What species concept is based on Carolus Linnaeus’ book?
Typological species concept
What type of scientist studies lampreys?
Ichthyologist
T/F blastopore forms the anus in tunicates
True its a deuterostome
What is advanced in fishes: spiral valve or no spiral valve
No spiral valve
What is the term for organisms that have a variable body temp?
Poikilotherms
T/F The biological species concept accepts intergradation (mixing of subspecies)
True because ability to breed determines species
T/F Freshwater and saltwater fish actively pump ammonia out of the gills?
f
What class are ratfish in?
Chondrichtyes
T/F Lungfish have one atrium
ALL fish have one atrium
Being able to reproduce in the larval stage is called
neoteny
Which fish group came first
ostracoderms
Name a physostomous (intake air through esophagus, enter bladder through pneumatic duct) fish group
Lungfish, Gars, Bowfins
T or F Freshwater fish drink water saltwater fish don’t
F Freshwater fish never drink water and pee alot
How many living classes of vertebrates are there?
8
What is primitive spiracle or no spiracle?
no spiracle
Name an animal phylum where we see spiral cleavage
Annelida, Mollusca, Arthropoda
t/f the evolutionary species concept doesn’t accept hybridization
false
Of the two fish groups with swim bladders, which has a pneumatic duct
Physostomous
What ray-finned fish superorder is the most advanced?
Teleostei
What substance makes sharks buoyant?
Squalene
Which primitive subphylum of chordate didn’t give rise to vertebrates
Cephalochordata
t/f sharks sink faster in freshwater
True
t/f more described amphibian species than mammal species
true
What substance do stingrays store in their muscles to help with osmoregulation
urea
Which hemichordate group is closest related to chordates?
Pterobranchs
