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Mammals
A section in the Vertebrate Study Guide
Question | Answer |
---|---|
What are some defining characteristics for mammals? | Hair or fur, birth to live young, mammary glands for sweat & oils & milk, lungs, 4 appendages, warm-blooded; 3 inner ear bones |
What must mothers do for their mammalian young? What is the part called involved in this? | Nurse their young mammary glands. |
What do mammals use to breathe? | lungs |
Where can mammals live? | land |
Are mammals ectotherms or endotherms? | endotherms |
How many chambers do mammalian hearts have? | 4 |
What is covering the skin and what is its purpose? | hair that insulates the body from cold, heat, wind, water |
What are modified forms of hair? | “Wool, spines, quills, and certain horns are modified hair.” |
What is a carnivore? | Only eats meat |
What is an herbivore? | Only eats plants |
What is an omnivore? | Eats plants and animals |
How are jaws and teeth adapted? | According to their specialized diets. Know canines, incisors, molars |
What are the 3 types of mammals? | Monotremes, Marsupials, Placentals |
Describe monotremes. Examples? | Lay eggs with leathery shell. Mammary glands not concentrated, all over the body. Duck-billed Platypus |
Describe marsupials. Examples? | Born not fully developed. Young attach themselves to mammary glands to fully develop. Pouch. Kangaroo, koalas |
Describe placentals. Examples? | Largest group of mammals. Humans, cats, whales |
What is the gestation period? | Development from fertilization to birth |
What is exchanged through the umbilical cord? | Food, oxygen are exchanged through the umbilical cord |
*Pick a beak you feel is most advantageous! | Swiss Army Knife because they are multipurpose |