Topic 19

Question 1

Synapsids

Answer 1

Mammals, sailbacks, therapsida

Question 2

Therapsids

Answer 2

-Enlargement of dentary bone
-Secondary Palate

Question 3

Mammalian Characteristics
(5)

Answer 3

Mammary Glands
–> division of secondary palate
1. Endothermic
2.Dentition more differentiated than reptiles
–>diversity of diet
3. Mammalian teeth occlude closer than reptiles
4. two sets over lifetime
5. Vertical placement of limbs
6. Hair
7. Diaphragm

Question 4

Milk

Answer 4

High Protein and antibacterial immune enhancing properties

Question 5

Marsupials and Eutherians
what in common?
what are the placental membranes homologous to???

Answer 5

Plancenta
-placental membranes are homologous to amniotic egg
nursed w nipples

Question 6

Eutherians
based on what evidence??

Answer 6

-nourished w placenta untill very well developed.
-no cloaca
DNA and morphological evidence

Question 7

Tree shews

Answer 7

Order Scandenita
sister to primates

Question 8

Order primates characteristics

Answer 8

Thumb and toe widely separated
Flat nails
large brain,
short jaw
Forward eyes
Pentadactyle

Question 9

Hominidae

Answer 9

“great apes”
no tail

Question 10

our species evolved from :

Answer 10

H. Heidelbergenis