Chapter 27

Question 1

What are the 3 chordate types

Answer 1

Lancelets, tunicates and vertebrates

Question 2

Notochord provides

Answer 2

Support and replaced Skelton

Question 3

The nerve cord…

Answer 3

Develops into the brain and spinal cord

Question 4

The 3 key features of a chrodates

Answer 4

Notochord, nerve cord and post anal tail and pharyngeal gill slips

Question 5

All vertebrae’s have

Answer 5

Clusters of hox genes,
A vertebral column
Cranium
Endoskeleton
Diverse internal organs

Question 6

Importance of pharyngeal Gil slits

Answer 6

Used to take in oxygen

Question 7

What are the 2 cyclostomes

Answer 7

Hagfish and lampreys

Question 8

Hagfish vs lampreys

Answer 8

Hagfish have notochord and lampreys posses a rudimentary vertebral column

Question 9

Gnathstomes are

Answer 9

Animals with jaws and enlarged brain

Question 10

Chnondrivhthyes examples

Answer 10

Sharks, skates and rays q

Question 11

Chondrichthyes are also known as

Answer 11

Cartilaginous fishes

Question 12

How does water move through sharks ?

Answer 12

Through their mouth and across gills

Question 13

Chondrichthyes teeth are

Answer 13

Not set into their jaw

Question 14

Oviparity

Answer 14

Lays eggs

Question 15

Ovoiparity

Answer 15

Eggs retained in female, no placenta

Question 16

Vivparity

Answer 16

Eggs develop in uterus, nourished by placenta

Question 17

Ostechthyes are

Answer 17

Bony fish

Question 18

Key features of a osteichthyes

Answer 18

Protective operculum,
Swim bladder
Bony skeleton

Question 19

How do most osteichthyes reproduce

Answer 19

External fertilization

Question 20

How do ray finned fish move

Answer 20

Muscles through their body they are supported by thin, bonds flexible rays

Question 20

Actinopterygii are

Answer 20

Rey finned fish

Question 21

Actinopterygii are ____ group

Answer 21

Monophyletic

Question 22

Sarcopterygii are supported by skeletal extension

Answer 22

Moved by muscles within the fins

Question 23

When lobe fins developed into legs they became

Answer 23

Tetrapods and then amphibians

Question 24

Benefits of tetrapod/amphibians

Answer 24

Avoidance to predators and new source of food

Question 25

What can be blamed from changes of

Answer 25

The hox genes

Question 26

What happened to most amphibians

Answer 26

They return to water to reproduce

Question 27

Who can absorb oxygen across the skin

Answer 27

Tetrapods

Question 28

3 orders of amphibians

Answer 28

Anura, Apoda, urodrela

Question 29

Anura’s are

Answer 29

Frogs and toads whose prime legs can be used for jumping or swimming with no tail

Question 30

Apoda’s are

Answer 30

Wormlike caecilians that are nearly blind and legless

Question 31

Ureodela’s are

Answer 31

Salamanders with legs, long tail and elongated body

Question 32

Amniotic eggs are

Answer 32

Evolution of a shelled eggs sheltered the embryo from desiccation on land

Question 33

With an amniotic egg

Answer 33

Reproduction was no longer tied to water

Question 34

What protects the embryo

Answer 34

Amnion

Question 35

What is the shell imperable to

Answer 35

Water

Question 36

Where does gas exchange in the emrbryo And encloses waste

Answer 36

Allantois

Question 37

What encloses nutrients

Answer 37

Yolk sac

Question 38

Mammals reproduction

Answer 38

Viviparous

Question 39

Testudines are

Answer 39

Turtles

Question 40

Squatmata characteristic

Answer 40

Kinetic skull and joints are mobile

Question 40

Fishes have ___ chamber

Answer 40

2

Question 41

Amphibians have ___ chamber and __ loop

Answer 41

3 and 2

Question 41

Turtles characteristics

Answer 41

Long lived Lack teeth Lay eggs on land

Question 42

Birds, cordillera and mammals have ___ chambers

Answer 42

4

Question 42

Reptiles have ___ chambers

Answer 42

3

Question 42

All aves have

Answer 42

Feathers

Question 43

Birds unique features

Answer 43

Feathers Air sacs (9) Reduction of organs Lightweight bones

Question 44

Reptiles; Aves;

Answer 44

Birds

Question 45

Avian characteristics

Answer 45

Excellent vision, warm body temp

Question 46

Mammals emerged from the

Answer 46

Mid Triassic period, from aminotes

Question 47

Prototheria

Answer 47

Order monotremata and lay eggs

Question 47

Mammals characteristics

Answer 47

Mammary glands Hair Speciliazed teeth Englarged skull

Question 48

The 2 mammalian order

Answer 48

Prototheria and theria