Lecture 1

Question 1

What are the 3 subphyla of the phylum Chordata?

Answer 1

1. Cephalochordata
2. Urochordata
3. Vertbrata

Question 2

What is the major characteristic of the subphylum cephalochordata?

Answer 2

Include Cephalochordates or lancelets. Ex: amphioxus, genus Branchiostomata

Question 3

Whats the major characteristic of the subphylum Urochordata?

Answer 3

These include ascidians (sea squirts), thaliaceans, and larvaceans, all of which are SMALL MARINE ORGANISMS

Question 4

What are the major characteristics of subphylum Vertebrata?

Answer 4

All the characteristics that make US Vertebrates

Question 5

What are the major classes of subphylum Vertebrata??

Answer 5

Pisces and Tetrapods

Question 6

The major class, Pisces, contains what?

Answer 6

contains all the fishes

Question 7

What are the characteristics of the Class Agnatha?

Answer 7

Jawless, and lacks paired appendages.

Ex. Hagfish and freshwater lampreys

Question 8

What are the characteristics of the Class Acanthodii?

Answer 8

“spiny sharks”, not really sharks, but do have spines.

FIRST VERTEBRATES WITH JAWS

Question 9

Which Class of Vertebrates does not have a jaw?

Answer 9

Agnatha

Question 10

The Placodermi are known to have these two features:

Answer 10

jaws and paired fins.

Question 11

The Chondrichthyes have these characteristics:

Answer 11

lack ability to form bone, skeletal system is made entirely of cartilage.

Related to sharks, skates, and rays

Question 12

Osteichthyes:

Answer 12

Largest number of species of fishes, They have a skeletal system formed from bone, but many still retain a considerable amount of cartilage w/in their sk. system

Question 13

What makes the Class Mammalia different from the other Tetrapod classes?

Answer 13

presence of hair and mammary glands

Question 14

Class Aves have what special feature?

Answer 14

feathers

Question 15

What are the characteristics of phylum Chordata that may be shared with members of the invertebrate phyla?

Answer 15

1. Cephalization
2. complete digestive tract
3. Bilateral symmetry
4. Metamerism
5. Triploblasy
6. Eucoelomate body cavity
7. Closed circulatory system
8. Deuterostomy

Question 16

Big Three (four) chordate characteristics:

Answer 16

1. Dorsal hollow nerve chord
2. Pharyngeal “gill” slits, arches and pouches
3. NOTOCHORD
4. Post-anal tail

**Don’t have to be present in the adult, but must be present in the embryo or larva.

Question 17

Major characteristics of subphylum vertebrata

Answer 17

1. vertebral column **ONLY FOUND IN VERTEBRATES

Question 18

Why would the notochord be retained to some degree in vertebrates such as fishes and salamanders?

Answer 18

Because it allows for more flexibility and undulating movements of swimming.

Question 19

where can the remnants of the notochord be found in humans?

Answer 19

Nucleus Pulposus, part of the vertebral disk system.

Question 20

All modern vertebrates except ____________ have two pairs of appendages

Answer 20

cyclostomes

Question 21

Three basic differences between the three chordate subphyla:

Answer 21

.

Question 22

L/O #7: Describe axes, etc.

Answer 22

If you are using these cards, I did not make cards for any anatomical landmarks, planes, or motions which I already know. Sorry