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Bio
Mammalia
43
Biology
Undergraduate 1
03/19/2013

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Term
Mammalia is what taxonomic category?
Definition
Class
Term
Mammalia belongs to what superclass?
Definition
Tetrapods
Term
Mammalia belongs to what clade?
Definition
Amnyotes
Term
What special features do mammals have on their skin?
Definition
Hair and mammary glands.
Term
How do mammals respire?
Definition
With diaphragm and lungs.
Term
How do mammals get their heat?
Definition
Endothermically
Term
What kind of embryonic development does mammalia have?
Definition
Viviparous with an amnion, and some oviparous
Term
What is the brain size of mammalia?
Definition
Large
Term
When did the first mammals appear?
Definition
~200 mya with dinosaurs
Term
What were the first mammals like?
Definition
Small, nocturnal, insect eaters.
Term
Monotremes
Definition
Egg-laying mammals
Term
Egg-laying mammals
Definition
Monotremes
Term
What are examples of a monotreme?
Definition
Echidna and platypus
Term
Where are monotremes found?
Definition
Only in Australia and New Guinea
Term
Placenta
Definition
Tissue that exchanges nutrients and waste between mother and embryo.
Term
Tissue that exchanges nutrients and waste between mother and embryo.
Definition
Placenta
Term
What is the placenta derived from?
Definition
Uterine lining and extra embryonic membranes.
Term
Where does development continue in monotreme embryonic development?
Definition
Marsupium
Term
Marsupium
Definition
Mother's pouch
Term
Mother's pouch
Definition
Marsupium
Term
In what order and in what places does monotreme embryonic development take place?
Definition
First the uterus with support from the placenta, then the marsupium.
Term
What group of mammals bear fully developed, live young?
Definition
Placental Eutherians
Term
Placental Eutherians
Definition
Mammals that bear fully developed, live young
Term
Mammals that bear fully developed, live young
Definition
Placental Eutherians
Term
What are examples of Placental Eutherians
Definition
Humans, dogs, whales, rodents, bats.
Term
What are placental Eutherians supported by in development?
Definition
Placenta
Term
Primate is what taxonomic category?
Definition
Order
Term
Order primate is within what group?
Definition
placental eutherians
Term
What are examples of order primate?
Definition
Lemurs, monkeys, apes (humans)
Term
What special characteristics does order primate have on their limbs
Definition
Grasping hands and feet.
Term
What kind of eyes does order primate have?
Definition
Forward looking eyes.
Term
What quality of eyesight do primates have?
Definition
Good vision.
Term
What size brain does order primate have?
Definition
large brain
Term
How may order primate be divided by its phylogeny?
Definition
New World Monkeys and Old World Monkeys
Term
Characteristics of New World Monkeys
Definition
Aboreal, have tails
Term
Characteristics of Old World Monkeys
Definition
Aboreal and ground dwelling, apes lack tails.
Term
Aboreal
Definition
Live in trees
Term
True or false: Old World and New World Monkeys both lived in trees.
Definition
True.
Term
What is important to remember about human ancestry?
Definition
Species tended to overlap because evolution is a gradual process.
Term
How long have homo sapiens been around for?
Definition
~200,000 years
Term
How do homo sapiens compare to their ancestors?
Definition
- Bipedal
- Brains are large
- Upright more
- Taller
- Tool use expanded
Term
What happens first in the embryonic development of monotremes?
Definition
Brief gestation period in the mother's uterus.
Term
What length jaw does order primate have?
Definition
Short jaw
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