what is a mammal?

Question 1

what are prototheria?

Answer 1

monotremes (oviparous, cloaca)

Question 2

what are Therians?

Answer 2

bear live young - came from post cretaceous

Question 3

what are metatheria?

Answer 3

they are marsupials ( pouch and dentition)

Question 4

what are eutheria?

Answer 4

mammals with a placenta- birth live young and feed outside

Question 5

what do all mammals have in common?

Answer 5

all warm blooded

have hair

produce milk

have a jaw

middle ear bone

Question 6

what is the hair/ fur made out of?

Answer 6

keratinous filaments made in follicles

Question 7

why is the hair coloured?

Answer 7

camouflage

communication

thermoregulation

Question 8

what are the important parts of the mammal?

Answer 8

vertebrae - cervical, thoracic, lumbar, sacral and caudal

there is much conservation but variations lead to increased and decreased mobility