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Ecology > vertebrates (exam3) > Flashcards

vertebrates (exam3) Flashcards

1
Q

are vertebrates monophyletic?

A

yes

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2
Q

what class of vertebrates are ‘jawless’?

A

hagfishes and lampreys

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3
Q

How many species of jawless vertebrates are there?

A

> 150

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4
Q

of the 4 major traits, how many do jawless vertebrates retain to adulthood?

A

all 4

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5
Q

Gnathostomes are also known as ____.

A

jawed vertebrates

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6
Q

How many lineages of jawed vertebrates are there?

A

5

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7
Q

What are the common names of the major lineages of jawed vertebrates?

A

-Cartilaginous fishes
-Ray-finned fishes
-Coelacanths
-Lungfishes
-Tetrapods

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8
Q

What are placoderms?

A

the oldest ancestor to the jawed fishes

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9
Q

What are common features for Chondrichthyes?

A

-no bones
-paired lateral fins

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10
Q

What is the scientific name for the group that includes sharks, rays, and skates? (cartilaginous fishes)

A

Chondrichthyes

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11
Q

What is the common name for Actinopterygii?

A

ray finned fishes

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12
Q

What is a common feature for ray finned fishes?

A

protrusible jaw

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13
Q

What is the common name for Actinistia?

A

coelacanths

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14
Q

What is a common characteristic of coelacanths?

A

four fleshy, lobed fins, supported by bones

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15
Q

What are the 3 lineages of bony fish?

A

-Ray finned fishes
-Coelacanths
-Lungfishes

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16
Q

What is the common name for dipnoi?

A

lungfishes

17
Q

What are the 2 lineages of bony fish?

A

-lungfishes
-coelacanths

18
Q

What lineage do caecilians fall under?

A

amphibians

19
Q

What are amniotes?

A

animals whose embryos develop in an amniotic sac

20
Q

Oviparous

A

species (mostly reptiles) that produce an amniotic egg

21
Q

Viviparous

A

species in which the amniotic sac is kept internally

22
Q

Are mammals ectotherms or endotherms?

A

endotherms

23
Q

Are reptiles ectotherms or endotherms?

A

ectotherms

Ecology (11 decks)

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