Topic 17

Question 1

Lobe fin to:

Answer 1

Limb
w digits and joints

Question 2

Order of
reptiles
amphibians
mammals
crocodiles
birds

Answer 2

1. Amphibians
2. Reptiles
3. turtles, crocodiles, mammals
   4.lizards and snakes
4. birds

Question 3

Challenges of coming to land

Answer 3

1. Gravity
2. Desiccation
3. Temperature regulation
4. Locomotion
5. Respiration
6. Reproduction

Question 4

tetrapod

Answer 4

Vertebrae w 2 pairs of skeleton supported limbs
digits too

Question 5

Tiktaalik

Answer 5

fishy features but also tetrapod features
intermediate between tetrapod and fish

Question 6

what does a neck do and what does it mean?

Answer 6

it lets organism move head independently
shoulders are not fused to the skull, and provides space for muscles

Question 7

Pelvic girdle tetrapod vs lobe finned

Answer 7

tetrapod: pelvis attached
lobe finned: pelvis not attached

Question 8

early tetrapods (acanthostega)
primative traites and derived traites

Answer 8

PRIMATIVE TRAITS :gills, lateral line, fin rays, no true elbows or wrists, does not support weight
DERIVED TRAITS: 4 limbs w bony digits

Question 9

Early amphibian
primative and derived traites

Answer 9

Primative: Gills, lateral lines
derived: limbs ATTACHED to vertebrae
weight bearin joints

Question 10

Class amphibia
paraphyletic mono or para???
Fertilization?
egg?

Answer 10

Monophyletic
thin skin- breathe through dat shi
Buccal bump
external fertilization
eggs that lack shell
not FULLY adapted to land

Question 11

Order anura

Answer 11

frogs, they jump

Question 12

order Urodela

Answer 12

salamander
predators
damp environments

Question 13

Order Apoda

Answer 13

no legs- fuckin snakes bruh

Question 14

What are the causes of amphibian decline

Answer 14

heres like 2(i am not remembering the rest fuck that)
parasitic tapeworm
chydrid fungus