AnimalsThatConqueredPlanetLEC35 Flashcards

1
Q

class Mammalia

A
  • have more than 5,000 living species

- only animals with memory glands

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2
Q

Monotremes

A

small group of egg-laying mammals including the spiny anteater & platypus

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3
Q

marsupial

ex. opossums, kangaroos, koalas, sugar glider, & tasmanian devil

A
  • live in australia
  • born very early in its development
  • completes embryonic development nursing in marsupium (pouch)
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4
Q

Eutherians

ex. zebra & humans

A
  • placental mammals

- most successful animals

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5
Q

T or F, Many large mammals have recently disappeared

A

True, like giant rhinos with no horns

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6
Q

order Primates

A

lemurs, tarsiers, monkeys, & apes

*humans are members of the ape group

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7
Q

Derived Characters of Primates

A

–opposable thumb
–large brain & short jaws
–forward-looking eyes
–well-developed parental care & complex social behavior

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8
Q

lemurs live in…

A

Madagascar

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9
Q

Carnivorous tarsiers live in…

A

Southeast Asia

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10
Q

what does the group anthropoid contains?

A

Monkeys, our closet relatives

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11
Q

how old is Homo sapiens? how long has life existed on earth?

A
  • 130,000 years old

- 3.5 billion years

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12
Q

Derived Characters of Humans

A

–Upright posture & bipedal locomotion
–Shortened jaw
–Larger brains
–Complex tools

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13
Q

how many fossils of extinct apes was discovered that are closely related to humans? what do we call them?

A
  • 20 species

- hominins

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14
Q

where did Hominins originated?

A

in Africa 7 mya

*Early hominins had a small brain, but probably walked upright

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15
Q

Australopithecines

A

a group of hominins that lived between 4-2mya

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16
Q

Homo habilis

A

earliest fossils in our genus Homo that appeared 2.4 mya

17
Q

Homo erectus

A

first species to leave Africa which began about 2 million years ago