Mammals Part 1 Flashcards
Explain the three characteristics that make the Order Monotremata “reptilianlike.”
- Cloaca
- Locomotion
- Oviparous
Explain/describe the other characteristics of the order Monotremata
- No teats
- No vibrissae
- males have horny spurs on ankles
In the Order Monotremata, How do young suckle milk?
Mother sweats milk, young sucks milk off the fur
What kinds of animals are in the Order Monotremata?
- Duck-billed Platypus
- Spiny Echidna
Where do the Order Marsupials live?
Australia
What is unique about the Order Marsupial gestation and the way the embryos develop?
- Short gestation
- young born underdeveloped
- develop in the marsupium (pouch)
What is a marsupium?
fur lined pouch
What are the characteristics of the Opossum?
- robust immune system
- larger number of teeth
What kinds of animals are in the Order Marsupials?
- Koala
- Kangaroo
- Wallaby
- Wombat
- Opossum
What does it mean to be a placental mammal?
- The young develop in the placenta and are a live birth
- viviparous
How are the Order Soricomorpha different than rodents?
Sharp-pointy teeth unlike rodents
What does fossorial mean?
spends most of it’s life underground
How are moles adapted for digging?
powerful front limbs
What kinds of animals are in the Order Soricomorpha?
- Shrews
- Moles
How is the body of a bat adapted for flight?
- keeled sternum
- hollow bones
Describe the arm of a bat/hand/wing structure of a bat
hand is formed into wings w/ double membrane of skin stretching between fingers and extending to forearm
What is echolocation in bats?
they emit sound waves that bounce back to sense prey
Why are bats beneficial?
- insect control
- pollinators
Describe the teeth of lagomorphs?
- 4 upper incisors, 2 behind the incisors
- 2 lower incisors
- no canine teeth
- grow throughout life
What are the characteristics of a rabbit?
- altricial young
- burrow underground