Ch 24 Flashcards
What are the characteristics of chordates
- Notochord
- Dorsal nerve cord
- Gill slits
- Post anal tail
What do invertebrate chordates lack, compared to vertebrate chordates?
Backbone-
they have bands of muscles that protect their notocord and nerve cord
What groups are included with invertebrate chordates?
Tunicates (sea squirts)
Lancelets
Which invertebrate chordates have all chordate characteristics as larvae but not adults
Tunicates
Which jaw less fishes have sucker like mouths with rasping teeth on tongue used to suck blood and body fluids?
Lampreys
How many chambers do mammals have?
4
What are the main subgroups of mammals? Give examples
Monotrems- platypus
Marsupials- kangaroos
Placental Mammals- Rats
Which invertebrate chordates have all chordate characteristics as larvae and adults?
Lancelets
What type of fish are included in the class Chondrichthyes? Give examples
Sharks, skates, and rays
How many chambers does the amphibian heart have?
3
Which jaw less fish produce massive amounts of slime as a defense mechanism?
Hagfish
What are some adaptations birds have for flight?
feathers hollow bones shelled eggs single ovaries (females) can control body temp in flight
How many chambers does the reptilian heart have?
3
except crocs and birds they have 4
What are two classes that are included in the group of Jaw less fishes?
Hagfish
Lampreys
Mention the main adaptations that allow vertebrates to invade most habitats
- Endoskeleton
- Paired appendages
- Brain size & sensory structures
What two type of fish are included in the class Osteichthyes?
Ray-Finned
Lobe-Finned
What are the characteristics of mammals?
- Warm Blooded
- 4 chamber heart
- Most have hair/fur
- appendages
- highly developed brain
What type of fish gave rise to Tetrapods?
Lobe-Finned
How many chambers does a fish heart have?
2
On a remote island, a new animal is found. It has a four-chambered heart and lungs and is endothermic. It has internal fertilization, lays shelled eggs, and nurses its young after they hatch. This animal is most likely a(n)
- monotreme. - reptile. - amphibian. - marsupial. - coelacanth.
monotreme
All chordates have
- gills. - a ventral, hollow nerve cord. - a backbone. - a bony endoskeleton. - a post-anal tail.
a post-anal tail.
The notochord persists into adulthood in all chordates. True or False?
- True - False
False
In sharks and rays, the skeleton is made of ________.
cartilage
What is the function of the vertebral column?
- Limit muscle attachments - Provide weight in aquatic life-forms - Tear and crush food - Help increase the metabolic rate - Protect the nerve cord
Protect the nerve cord
