Ch 32 Flashcards
What are the 4 morphological features of chordates
1 openings into the throat called pharyngeal gill slits
- A dorsal hollow nerve cord that runs the length of the body
3.a stiff and supportive flexible rod called notochord
- A muscular post anal tail
The vertebrates are a monophyletic group distinguished by two synamorphes
- vertebrae
- Cranium
Define vertebrae
It is a column of cartilaginous or bony structures which form along the dorsal side of most species
Define cranium
Is a bony cartilaginous or fibrous case that Encloses the brain
Together the vertebrae and the cranium protect the
Central nervous system
Vertebrate brains are divided into three distinct regions:
forebrain
midbrain
Hindbrain 
What is the purpose of the forebrain
It houses the sense of smell
What is the purpose of the midbrain
It’s associated with vision
What is the purpose of the hindbrain
It is responsible for balance and hearing
What is one of the hypothesis for the origin of the jaw
It is known as the gill arch morphology hypothesis
What is the gill arch morphology hypothesis
It is a mutation and natural selection that increase the size of the most anterior arch and modified is orientation slightly producing the jaw
Reptile adaptations for life on land
Developing watertight skin by layers of scales made of keratin
Breathing air through well developed lungs
Lay shelled amniotic eggs
Being ectotherm
Define ectotherm
Outside heated
Parental care of reptiles and or mammals
The physiological morphological or behavioral investment that increases the likelihood of offspring to survive
Fanning aquatic eggs with oxygen rich water
Guarding eggs from predators
Keeping eggs and young moist boy keeping them warm and dry
Supplying young with food
Teaching survival skills
Great apes are called
Hominids
