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Characteristics of Mammals
Monotremes
Marsupials
Placental Mammals
Miscellaneous
100
What is one characteristic that all mammals share?
Hair, specialized teeth, endothermic metabolism, mammary glands, live birth
100
Where are all monotremes found?
Australia
100
Give an example of a marsupial.
Koala, opossum, kangaroo, wallaroo, etc.
100
The time between fertilization and birth is called what?
Gestation period
100
What is one function of hair?
Insulation, sensory, cammo, defensive.
200
Which teeth are responsible for stabbing and holding food?
Canines
200
What makes the platypus unique?
Lays eggs, venomous, reptilian legs, etc.
200
Where are the two places that almost all marsupials are found?
Austalia, New Guinea (N. America)
200
What are domesticated animals? (definition) And give an example.
Mammals that have been bred for a specific purpose. Ex. dogs, horses, etc.
200
What are two nutrients found in milk produced by mammary glands?
Carbohydrates, protein, fat, calcium, water
300
The protein found in hair.
Keratin
300
How do female monotremes feed their young?
Slits on their stomach
300
What is the one part of a marsupial that is developed when born?
Front limbs
300
How does the mother nourish her unborn offspring?
Nutrients diffuse through the blood into the placenta.
300
Describe the teeth of mammals found in Order Rodentia.
Long sharp incisors
400
Name a mammal that has hair used for a defensive function.
Porcupine
400
List two things an echidna may eat.
Worms, insects, small invertebrates
400
What do the young of marsupials look like after birth?
Underdeveloped, no hair or eyes.
400
Describe the antlers on some placental mammals.
Made of keratin, can be shed or attached to skull.
400
What are ungulates?
Mammals with hooves
500
What are the four chambers of the mammalian heart?
R, L atria R, L ventricles
500
What is a cloaca?
A single opening used for digestive, urinary, reproductive functions.
500
Why is the distribution of marsupials so limited on Earth?
Because the continents broke up before they could migrate.
500
What is the relationship between the gestation period and the number of offspring?
The longer the gestation period, the fewer the offspring.
500
Why do mammal offspring have the highest survival rate?
The mother's only give birth to a few offspring which she can then devote all of her attention to.