Tripoblastic - Deuterostomes - Chordata - Reptilia Flashcards

1
Q

Reptiles don’t have feathers or hair but

A

Scales

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2
Q

Endothermic or ectothermic?

A

Endothermic

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3
Q

Lungs ventilated by

A

chest movement

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4
Q

How many heart chambers

A

3 or 4

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5
Q

Amniotic egg laid where?

A

on land, often in burrow

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6
Q

Reptiles are a paraphyletic group which means

A

They do not include all descendants of their most recent common ancestor

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7
Q

Most reptiles jaw muscles are protected by what?

A

outside cranium (brain box) and there are indentations into cranium

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8
Q

‘Anapsid’

A

No arch

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9
Q

Jaw movements can squeeze what?

A

Brain

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10
Q

Modern turtles have short jaws and

A

Toothless beaks

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11
Q

‘Synapsid’

A

single arch: modern mammals

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12
Q

‘Diapsid’

A

two arches: modern lizards, snakes and crocodiles

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13
Q

(Reptile order) What are testudines?

A

Turtles, terrapins and tortoises

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14
Q

What forms testudine shells?

A

Dorsal and ventral plats - bones on inside and scales on outside

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15
Q

Unlike snakes, testudine skin…

A

is moulted continually

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16
Q

Testudines are the only vertebrates with what enclosed by ribs?

A

Pectoral and pelvic girdles

17
Q

(Reptile order) What does tuatara mean?

A

Peaks on the back

18
Q

Tuatara have a third…

A

Eye covered with pigmented scales (unknown function)

19
Q

(Reptile order) What does squamata mean?

20
Q

Squamata are covered in scales made of?

A

Keratin - reduces water loss

21
Q

Can squamata both both upper and lower jaws?

A

Yes. Snakes can swallow large prey

22
Q

Squamata hearts have…

A

3 chambers partially separating oxygenated blood from deoxygenated blood

23
Q

Males have paired penises with

24
Q

How are snake’s organs arranged

A

Paired organs mostly lie one in front of the other to fit into narrow body

25
Females guard eggs until
Hatching and in some species, continue to guard and communicate after hatching
26
Sex determination by temperature?
Greater than 30 degrees males, lower than 30 are females
27
What group are extinct reptiles?
Dinosaurs
28
When did dinosaurs first appear?
230 million years ago
29
'Dinosaur'
Enormous lizard
30
Early dinosaurs were split into 2 major orders
Saurischia )lizard hipped) and Ornithischia (bird hipped)