Phylum Chordata Worksheet (Biology) (Page 4 of 4) in pdf

Phylum Chordata Questions

What is a “chordate”? What do these creatures possess?___________________________________________What is

another name for a chordate?__________________________________________

List the 7 major classes found in the Phylum Chordata_____________________________________

_________________________________________________________________________________________________

________________________________________________________________________________________________

List 3 characteristics that a rat and a whale should share since they are both classified as

mammals_________________________________________________________________________________________

__________________________________________________________________________________________

Which classes are endothermic? Which are exothermic? What do these terms

mean?___________________________________________________________________________________________

____________________________________________________________________________________________

What is the biggest difference between class Chondrichthyes & Osteichthyes? If you went to a restaurant and ordered

trout, what class do you think this fish would be classified

under?___________________________________________________________________________________________

_____________________________________________________________________________________________

Which class is thought to have been descended from dinosaurs? What characteristic does this class share with

dinosaurs?________________________________________________________________________________________

___________________________________________________________________________________________

Look at the root word of each Class name. List what each root word means and how it relates to the organisms in each

Class (you should have 7 answers, one for each Class in the Phylum)

A Whale Shark (above) is one of the largest creatures in the oceans. It has no fur, but does reproduce using fertilized

eggs and gives birth to live young that are not connected by a placenta but instead stay in a pouch inside the mothers

body. They do not have mammary glands and need to swim constantly or they sink. In what Class should this creature be

classified under? Explain your

answer___________________________________________________________________________________________

______________________________________________________________________________________________

There is a modern theory that Aves evolved from Reptilia. By comparing the characteristics of both classes, give two

facts that would support this theory and two facts that would discard this

theory.___________________________________________________________________________________________

______________________________________________________________________________________________

10. Circle which of these characteristics in Phylum Chordata probably evolved last

Endothermic/ exothermic

Water environment/ land environment

Bone/ cartilage

Large clutch sizes/ small clutch sizes

Large brain size/ small brain size

2 chambered heart/ 4 chambered heart

11. Which Class has the most species?______________________ Looking at these organisms habitats, does this number of

species make sense? Explain your

answer?__________________________________________________________________________________________

______________________________________________________________________________________________

Phylum Chordata Worksheet (Biology) Page 4