a. sharks and rays belong to class Agnatha.
b. sharks and rays belong to class Osteichthyes.
c. sharks and rays belong to class Chondreichthyes.
d sharks and rays are bony fish.
i am looking at option c. but it has the wrong spelling.....
help please!!!
2007-02-09 10:48:49 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Zoology
C is correct. Sharks and rays do have bones but they are constructed of cartilage. Bony refers to a harder non cartilage material found in the osteichthyes. Agnatha contain the jawless fish which also have their skeleton made of cartilage.
2007-02-13 00:51:07 · answer #1 · answered by ATP-Man 7 · 0⤊ 0⤋
Sharks and rays have no bones they have cartilage and belong to non vertebrates.
2007-02-09 10:54:38 · answer #2 · answered by Rio 6 · 0⤊ 1⤋
In a multiple choice test where there is no "none of the above" option, *always" go with the closest answer.
Here, a minor discrepancy of spelling, one extra letter, is the only issue.
2007-02-09 10:54:35 · answer #3 · answered by Jerry P 6 · 0⤊ 1⤋
c is correct, and well spotted. It should be Chondrichthyes. Sounds like your teacher should write it out 20 times. i'll let you suggest it though!!
2007-02-09 10:54:09 · answer #4 · answered by Anonymous · 0⤊ 0⤋
It is C but the spelling is wrong as you stated.
2007-02-09 10:53:02 · answer #5 · answered by Anonymous · 1⤊ 0⤋