Biodiversity - Reptiles and birds Flashcards
1
Q
what is the amniote egg?
A
self contained waterproof chamber for development that eliminated the larval stage
2
Q
benifit of amniote egg
A
can move away from water
3
Q
what are the layers of the amniote egg?
A
- shell - waterproof
- chorion - regulates gas exchange
- yolk sack - nourishes the embryo
- allantois - stores antrogenous waste
- amnion - protects embryo
4
Q
what is a fenestra
A
openings in the skull for attachment of jaw muscles, so jaw can open wide
5
Q
are reptiles monophyletic or paraphyletic?
A
paraphyletic
6
Q
number of reptile species
A
7000
7
Q
reptile features
4
A
- amniotic egg
- internal fert
- scales stop water loss
- ossifed skeleton
8
Q
hypothesis of dinosaur extinction
A
- outcompeted by mammals
- volcanic explosion
- asteroid
9
Q
examples of chelonia
3
A
- turtles
- terrapins
- tortoises
10
Q
chelonia features
4
A
- marine, fresh water and terrestrial forms
- sharp horny plates
- retractable limbs
- weak jaws
11
Q
examples of squamata
2
A
- snakes
- chameleon
12
Q
features of crocodilia
(crocodiles and alligators) 2
A
- live in water
- flattened tail for propulsion
13
Q
difference between alligators and crocodiles
A
- alligators lower teeth not visible
- alligators in fresh water, crodiles in salt water
- crocodiles more aggresive
14
Q
bird features
4
A
- feathers
- scaly legs
- amniote egg with hard shell
- monophyletic
15
Q
how are birds modifed for flight
5
A
- hollow bones
- less organs
- no teeth
- keratin bill
- large pectoral muscle for flight
