taxonomy

Question 1

how many mammalian orders are there?

Answer 1

29

Question 2

what have mammals evolved from? (give examples)

Answer 2

reptilian synapsids eg. morganocudon, tupaia tree shrew

Question 3

what do all mammals have in common?

Answer 3

they are amniotes with mammary glands and hair

Question 4

what 2 orders do the majority of mammals belong to?

Answer 4

rodentia, chiroptera (bats)

Question 5

what 3 lineages are mammals divided into? (in order of divergence)

Answer 5

monotremes, metatherians, eutherians

Question 6

name 3 features of a duck billed platypus skeleton that indicate it’s primitive design

Answer 6

horizontal humerus, rotated rear foot, cervical ribs (overall reptilian posture

Question 7

what is the common name for metatherians and what are some common characterestics within the lineage?

Answer 7

marsupials, give birth to altricial young after short gestation, raise and feed young in pouch.

Question 8

name the 7 orders of marsupial

Answer 8

didelphimorphia, paucituberculata, microbiotheria, dasyuromorphia, peramelemorphia, notoryctemorphia, diprotodontia.

Question 9

what 4 groups are eutherians divided into? give examples of animals included in each.

Answer 9

1.euarchontiglires- humans! 2.laurasiatheria-cows 3.xenarthra- armadillo 4.afrotheria-hyrax, elephant

Question 10

what is the key difference between ungulate orders perissodactyla and artiodactyla

Answer 10

perissodactyla have 1 digit, artiodactyla have 2 (horse hoof v goat hoof)