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17 Cards in this Set
- Front
- Back
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What are classic features of a mammal? |
- hair, mammary glands -pelage (fur coat) -molts -endotherms |
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What are some key characteristics of the skin and hair of mammals |
skin is thicker, hair forms from a hair follicle, grows, |
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What are the advantages of Hair |
- mechanical protection -colouration -waterproofing -buoyancy -behavioural signaling -thermal insulation |
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What are true horns |
not shed, not branched, hollow sheaths with keratinised epidermis |
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Antlers |
branched and solid bones -shed annually |
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Bats are the only mammals that can ________ |
Fly
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What is white nose syndrome |
a problem bacteria that causes the bats to wake up during hibernation and further causes them to starve over a period of time |
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What are special about bats ecolocation |
they can send 10 pulses per second but can go up to 200 pulses per second when locating prey |
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What is a monotremes? |
are oviparous and tend to eggs and young secrete milk onto belly in patches |
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What are Marsupials? |
have a pouch to carry their kids |
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What are the three stages of Marsupials |
1- one joey outside 2-one inside pouch- attached to a nipple, high fat low protein 3-another in the uterus in suspended animation |
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A _________________ helps to nourish the developing young; embryo develops in Uterus |
Placenta |
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A __________ cycle is when a heat occurs once or twice a year |
Estrus cycle |
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______________ period may change between mammals |
Gestation |
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What are other features of mammals |
-4 chambered heart -lungs with aveoli -2 kidneys -excrete urea -enlarged brain |
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what do scent gland do |
-produce pheromones -marking territory -warming and defence -communication with other same species |
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what are the three specialized teeth |
- incisors = snipping biting -canines= piercing -premolars and molars = slicing, grinding and crushing |
