Reptiles And mammals Flashcards
(15 cards)
What are the three major groups of mammals?
Monotremes, marsupials, placental
What are monotremes and what are some examples?
Monotremes-mammals that lay eggs. Example- platypus and echidna
What are marsupials and what are some examples?
Marsupials-a mammal of an order whose members are born incompletely developed and are typically carried and suckled in a ouch on the mothers belly. Example-kangaroo, koala, wallaby, etc.
What are placentals and what are some examples?
Placental-a mammal of a group characterized by the presence of placenta, which facilitates exchange of nutrients and wastes between the blood of the mother and that of the fetus. Example- tiger, dog, etc.
What does heterodontic mean?
When an animal posses more than a single tooth or morphology (different teeth)
What is amniotes?
Embryos are surrounded by a thin membrane
Characteristics of mammals?
Heterodontic, mammary glands, hair or fur, highly developed brain
Reptiles have a #? chambered heart?
Three
What are the groups of reptiles?
Squamata, crocodilia, testudines, shpenidontia.
The Squamata group includes…
Lizards and snakes
The crocodilia group includes…
Crocodiles, gharials, caimans, alligators
The testudine group includes…
Turtles and tortoises
The shpenidontia group includes…
The tuatara
How many orders of mammals are there?
19
What are mammary glands?
Sweat glands that can produce milk
