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Extra Ectotherm Short Answers Flashcards

(16 cards)

1
Q

What are the 4 Critical Innovations in the Gnathostomes?

A

Jaws and mineralised skeleton, scales and teeth, paired fins, lateral line.

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2
Q

Who are the 5 Members of the Superclass Gnathostoma?

A

Chonrichthyes, osteichthyes, amphibia, reptiles, mammals.

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3
Q

What are the 4 Identifying Features of the Tuatara?

A

2 bony arches at back of skull, teeth fused to jaw bone, no earhole or penis, developed parietal organ.

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4
Q

What are the 4 Identifying Features of the Lizard?

A

1 bony arch at back of skull, teeth attached to inner jawbone and replaceable, has earhole and penis, simple parietal lobe.

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5
Q

What is the Optimum Ratio for Fish Swimming?

A

4.5 (length/height).

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6
Q

What is a Poikilotherm?

A

Interval temperature varies greatly.

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7
Q

What is a Homeotherm?

A

Interval temperature is non-variable.

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8
Q

What are 5 Characteristics of Chondrichthyes?

A

Heterocercal caudal fin, rough skin, two chambered heart, cartilaginous endoskeleton, no swim bladder.

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9
Q

What are 3 Advances of Chondrichthyes over Agnatha?

A

Jaws and teeth, paired fins, enlarged brain-case.

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10
Q

What are 5 Characteristics of Osteichthyes?

A

Specious, bony skeleton, scaled skin, 2 chambered heart, swim bladder.

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11
Q

What are 5 Reptilian Characteristics?

A

Horny epidermal scales, paired limbs, lungs not gills, 3 chambered heart, ossified skeleton.

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12
Q

What is the Identifying Feature of the Reptilian Order Crocidylia?

A

Tail is swimming organ.

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13
Q

What is the Identifying Feature of the Reptilian Order Sarcosuchus?

A

Large.

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14
Q

What is the Identifying Feature of the Reptilian Order Testudines?

A

Fusion of ribs and vertebrae for shell.

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15
Q

What is the Identifying Feature of the Reptilian Order Tuatara?

A

Temperature determines sex.

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16
Q

How did the Pentadactyl Limb Develop?

A

Change from propulsion to support, different portions, extensor and flexor muscles to generate force.