Bio 108 - Lecture 23

Question 1

Cladogram Definition of Bony Fishes

Answer 1

Paraphyletic

Question 2

Class Osteichthyes

Answer 2

Original class that made up bony fish

Question 3

Some Characteristics of Bony Fish

Answer 3

Ossified Endoskelton
Bony Scales
Swim Bladder
Flexible Fins
External Fertilization

Question 4

Operculum

Answer 4

Gill openings covered by a single protective flap

Question 5

3 Classes of Bony Fish

Answer 5

Actinopterygii
Actinistia
Dipnoi

Question 6

Class Actinopterygii

Answer 6

Actin = Ray

Flexible rays that support fins

Question 7

Class Actinistia

Answer 7

Lobe-finned fishes

Pectoral and Pelvic Fins

Question 8

Class Dipnoi

Answer 8

Lungfishes
Pneu = air/breath
Gills and Lungs
Two modes of gas exchange

Question 9

Tetrapods

Answer 9

two pairs of sturdy skeleton-supported limbs with digits

• Terrestrial
• 5 Digits per limb

Question 10

Tiktaalik rosea

Answer 10

• Intermediate between fishes and tetrapods

Question 11

Two groups of Tetrapods

Answer 11

Amphibia

Amniota

Question 12

Class Amphibia

Answer 12

Monophyletic Group
Thin permeable skin
Use buccal pump to inflate lungs

Question 13

Life cycle of Amphibia

Answer 13

• Eggs lack shell
• internal fertilization
• Aquatic larvae
• amphi = both

Question 14

Order Anura

Answer 14

Living order of amphibia

• hind legs for jumping
• lack tail
• toads have poisen glands behind eyes

Question 15

Order Urodela

Answer 15

Has tails as larvae and adults
Salamanders
Paedogenetic