Flashcards in Prototheria Deck (27)
How may orders are found within the Protheria ?
Only one- The Monotremes
Give the development to Monotremes ?
They are the most primitive mammals alive today
True or False
Which super continent where the early ancestors of Monotremes restricted to ?
Southern supercontinent Gondwana
Why are they called Monotremes ?
'One holed species'
Single hole for faeces, urine, gametes
What is the name of the single hole in monotremes ?
What reptilian features remain in the monotremes ?
They lay hard-shelled eggs and brood them.
How do Monotreme infants suck milk ?
Lap tufts hair covering mammary glands
What is a Mammilae ?
A teat, Nipple. Enables milk delivery.
Monotremes have teeth
Monotremes are venomous
True or false ?
How many living species are there ?
Duck billed platypus
How many families of Monotreme are there ?
What are echidna spines made from ?
They are modified hairs, fur is beneath spines.
What is the diet of echidna ?
Invertebrates, ants, termites
Spines on roof of mouth and tongue enable digestion
Describe the life cycle of echidna offspring
Eggs hatch after 10 days
young move to a pouch where they feed off milk for 6 months
Give the 4 species of Ecidna
1 Short beaked- Australia
3 Long beaked- New guinea
Give the name of critically endangered echidna
V localised habitat
Give the adaption of platypus that enable them to hunt
Enables them to find benthic invertebrates as shut eyes when they dive.
What is the role of the hind feet
They are partially webbed
Act as rudders
What is the role of the front feet ?
They are fully webbed
Enable powerful swimming.
What is the role of the tail ?
Give the life cycle of the duck billed platypus's offspring.
Usually have 2 eggs, placed in a burrow
Incubated for 10 days
3-4 month lactation
Give the key adaption of male platypus,
Spurs on the rear ankles
Connected to venom glands in the high.
Increase in size at mating time
How many genes does the platypus have ?
Same number as humans
What genes are found in the bill of the platypus ?
Olfactory receptor genes
Platypus's contain genes from birds, what are these for ?