Save
Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Tetrapods

Bio Midterm 2

TermDefinition
Env of early tetrapods -same time animals were "invading the land" -mainly gymnosperms (water dependent) -swamp habitats and very food rich
evolution of tetrapods -lungfish with fins were ancestors -pectoral and pelvic find homologous to fore- & hind- limbs -lungfish are sister group to tetrapods bc dna evidence
tiktaalik and acanthostega -found in cold regions -lived in tropical warm climates -fossils moved with tectonic plates
genius tiktaalik -around 375 m.y.a -"fishpod" -between fish & tetrapod (characteristics of both groups)
tiktaalik trais 1. primitive neck -allowed head movement 2. forelimb bones 3. had pelvic girdle but not good 4. had ribs
genius acanthostega -lived around 360 mya -mainly aquatic but first tetrapod -well developed pelvic and pectoral girdles
acanthostega habitat -benthic organism on bottom of pools -able to come on land and crawl
traits of acanthostega 1. well developed muscular laterally compressed tail 2. well-developed gills 3. relatively well developed legs (weight bearing) 4. had toes 5. weak ribs and small lungs
Exaptation -an organism possesses a trait that was used for one purpose, but happened to be useful for other purposes -suggests teleology but NO!
exaltation examples 1. evolution of tetrapods (legs evolved first before tetrapods moved to land) 2. feathers(originally used for insulation but now used for flight
homologous -similar position, structure, and evolutionary origin, but not same function
Created by: 1186541148036268
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards