Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
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
Normal Size Small Size show me how
Stack #124860
chpt 12 sec 1&2
| Question | Answer |
|---|---|
| notochord | a flexible rod that supports the animal's back |
| cartilage | a connective tissue that is softer than bones, but flexible and strong. |
| vertebrae | similar bones lined up in a row, like beads on a string |
| endoskeleton | internal skeleton |
| ectotherm | an animal whose body does not produce much internal heat -- its body temperature changes depending upon the temperature of its environment |
| endotherm | an animal whose body controls and regulates its temperature by controlling the internal heat it produces |
| fossil | the hardened remains or other evidence of a living thing that existed a long time in the past |
| sedimentary rock | made of hardened layers of sediments, particles of clay, sand, mud, or silt. |
| fish | a vertebrate that lives in the water and has fins, which are structures used for moving. |
| jawless fishes | skeleton made of cartiloage and do not have fins and mouths do not have jaws. their mouths have structures for scraping, stabbing, and sucking. |
| catilaginous fishes | skeleton made of cartilage, have jaws and pairs of fins, pointed, toothlike scales voer their bodies, carnivores |
| bony fishes | have skeletons made of hard bone, body coved with scales and gills |
| swim bladder | an internal gas-filled sac that helps the fish stabilize its body at different depths |
| buoyant force | the force that water exerts upward on any underwater object |
Created by:
analopez
Popular Science sets