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Flashcards in Unit 5 Deck (38)
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1

Have transient placenta

Marsupials

2

List the types of keratinized scales

Placoid (ancestral)
Ganoid (derived)
More derived
Ctenoid
Absent
Cycloid

3

Viviparous and chorioallentoic

Eutheria

4

List functions of hair

Cryptic coloration
Insulating
Cooling
Predator deterrence
Temperature regulation

5

Midbrain is used in hearing (mesencephalon)

Anura (frogs)

6

What three groups are made up of fossil specimens only (no living representatives)

Ostracoderms
Placoderms
Acanthodia

7

Freshwater fish exhibit...

Hyperosmotic regulation

8

Fertilized eggs (with yolk) remain for a time with maternal parent

Ovovipary

9

Modifications in bone for hearing

Malleus
Stapes
Incus

10

Retemirable and oval are in what animals

Actinopterygii - ray finned dish

11

Extinct group of "fish" that are armored, vertebrates with articulated jaws derived from the first pair of gill arches.

Placoderms

12

What are the skull modifications in squamata

Loss of bones
Loose articulation of remaining bones

13

Have kinetic skulls

Squamata (snakes)

14

List some hair modifications

Vibrassae
Spines
Bristles
Awns

15

What group has motile non feeding larva and sessile feeding adults

Urochordata (tunicates)

16

Three types of caudal fins

Homocercal - rayfinned
Heterocercal - cartilaginous
Diphycercal - lobed finned

17

Characteristics of swimming

Body shape minimizes friction
Buoyancy means lower energy expedenture
Fin shape generates "lift"

18

What 3 terms describe the movements of fish in the water column

Pitch (up/down)
Roll
Yaw (side to side)

19

Grow continuously but never shed (fall off)

Horns

20

What Chordate features are present in Phylum Hemichordata

1. Dorsal, hollow nerve chord
2. Pharyngeal gill slits

21

When the larval stage become precociously reproductive

Paedomirphosis

22

Characteristics of testudines

Loss of teeth
Ossified keratinized plates (pelvic/pectoral girdles)
Good vision and smell but poor hearing

23

Adjacent to swim bladder, transmits vibrations in actinopterygii

Webberian ossicles

24

Separates oral from nasal cavity to allow breathing and chewing simultaneously

Secondary palate

25

Has cartilaginous endoskeleton

Chondricthyes

26

Extinct group of "fish" that are jawless, armored, vertebrates

Ostracoderms

27

List in order the groups that lead up to the mammals

Synapsids----->Therapsids----->Cynidonts----->Mammalian

28

What terms are used to describe the three styles of candle fins

1. Homocercal (bony fish)
2. Heterocercal (cartilaginous fish/sharks)
3. Diphycercal (lobed finned fish)

29

Fertilized eggs (invested with yolk) mature/develop away from maternal parents

Ovipary

30

Has no ossified endoskeleton

Cephalospidomorphi