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.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

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

Stack #1733383

QuestionAnswer
Scientists believe the blank were the first animals to exist in multicellular form. sponges
the whiplike structures sticking out of the sponge is called blank direct the current of water through the sponge. flagella
three phyla of worms are segmented, round, and flat worm
the flat worm has blank digestive system opening, the blank has two one roundworm
blank are segmented worms with a well developed body system including blank, blank, and blank earthworms nervous digestive and circulatory system
scientists believe that blank were the first group of animals to live on land and the first to have blank arthropods jointed appendages
examples of crustaceans are crabs shrimp lobster
examples of arachnids are spiders ticks scorpions
animals with backbones are blank
Created by: micklepickle