All fishes in the class Chondrichthyes are alike in the.....?

Question

a.foods they eat

b.size and form of their teeth

c.shape of their bodies

d.composition of their skeleton

Answer 1

Chondrichthyes or cartilaginous fishes are jawed fish with paired fins, paired nostrils, scales, two-chambered hearts, and skeletons made of cartilage rather than bone. They are divided into two subclasses: Elasmobranchii (sharks, rays and skates) and Holocephali (chimaera, sometimes called ghost sharks). The skeleton is cartilaginous. The notochord, which is present in the young, is gradually replaced by cartilage. Chondrichthyes also lack ribs, so in the event that they left the water, their own body weight would crush their internal organs long before they would suffocate.

Members

    * Chimaeras

    * Sharks

    * Skates

    * Rays

These types of chondrichthyes are all different animals and therefore different shapes and sizes and from here you can look up what they eat

Answer 2

All the above options have some element of truth in them most especially option c, and d. but depending on the level of specificity of the answer you require,you should focus your attention on to optio n d, find more information in textbooks.

Answer 3

D

Chondrichthyes or cartilaginous fishes are jawed fish with paired fins, paired nostrils, scales, two-chambered hearts, and skeletons made of cartilage rather than bone.

Answer 4

D: Chondrichthyes are cartilage-boned fishes. In all other aspects (a,b,c), they vary.