Topic 31 Clade Amniotes

Question 1

Amniotes

Answer 1

a group of tetrapods
whose extant members are the
reptiles, including birds, and
mammals

Question 2

Amniotes are adapted for

Answer 2

terrestrial life

Question 3

unifying shared, derived trait of clade

Amniotes

Answer 3

amniotic egg

Question 4

shared, derived traits of amniotes

Answer 4

1. amniotic egg
2. internal fertilization via intromittent organ (for copulation)
3. direct development into terrestrial form

Question 5

four extraembryonic membranes of amniotic egg

Answer 5

allantois (waste disposal, gas exchange), chorion (gas exchange across shell), amnion (protects from mechanical shock), and yolk sac (nutrients)

Question 6

shell for

Answer 6

prevents water loss

Question 7

terrestrial adaptations of amniotes

Answer 7

impermeable skin and lung ventilation powered by axial skeletons

Question 8

two major extant clades of amniotes

Answer 8

diapsids (reptiles like turtles, crocodilians, and birds) and synapsids