Study Guides (248,496)
Canada (121,594)
Biology (360)
BIO120H1 (144)
Final

eeb267 Exam note
Premium

15 Pages
87 Views
Unlock Document

Department
Biology
Course
BIO120H1
Professor
thompson/barrett
Semester
Fall

Description
1how to breathe First nostrils for odour detection Choana posterior nostrils that open into the roof of the mouth 2 How to move Fin rays eventually lost in tetrapodsray ns do not contribute to limb formation Stage one panderichtys Pectoral n complete upperhumerusand lowerradiusulna forelimb Beginning of wrist carpals radials and many n rays Pelvic n complete upperfemur and lower hindlimbs tibiabula begging a of ankletarsals radials and many n rays Stage two tiktaalik Articulation between upper and lower arm boneselbow joint Articulation between lower arm bones and carpalsexible wrist No bones between collar bone and skullneck mobility Stage three acanthostega HandmetacarpalsngersFootmetacarpalstoes No more n rays in the paired appendages Amphibia skin1Gymnophiona ACaudata BAnuraCBenet of skin permeable to gases and water efciency depends on surface moistness Cutaneous respirationbreathe through skin Cost skin must be moist all the time Gymnophiona Longlimbless no arms legs pelvic girdle or pectoral girdleReduceno tailsAnnuli Robustossied skull for burrowing Moist tropical environments and most are terrestrial some are complete aquatic Bright colors toxic All species have internal fertilization via phallodeum75 viviparous matrotrophic 25 oviparouslecithotrophicSome oviparous matrotrophic produce lipid dermis that babies eat Special fetal dentition CaudataAdults have no tailno scales Temperate Weak limbs 90 degrees to body Lost pelvic girdle and hindlimbs in some speciesReduced forelimbs and hindlimbs Sequester tetrodotoxin unken display No vocal cords Internal fertilization males do not have intromitten organ through spermatophores Courtship pheromonesslapping wafting scratching Oviparouslecithotrophic 50female guarding of eggs50 no gaurding Anura Tailless adults back legs stronger then front Terrestrialfew totally aquatic No marine species Toxic secretions sequestered Bufonids produce cardio toxins species have external fertilizationall species use amplexus Oviparous lecithotrophic Most species have no care
More Less

Related notes for BIO120H1

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit