What is a fish? 答案 鱼是什么?【复数】 fish或 fish.esAny of numerous cold-blooded aquatic vertebrates of the superclass Pisces,characteristically having fins,gills,and a streamlined body and including specifically:鱼:具有鳍、鳃和线形体型的冷血水生脊椎鱼纲动物中的任意一种并且尤指包括:Any of the...
Any of various primitive aquatic vertebrates of the class Cyclostomata,lacking jaws and including the lampreys and hagfishes.鳗类,鳗:无颚的各种原始水生圆口纲脊椎动物中的一种,包括七鳃鳗和盲鳗Any of various unrelated aquatic animals,such as a jellyfish,cuttlefish,or crayfish.水生动物:与鱼无直接联...
The only living agnathans arelampreys and hagfishes(class Cyclostomata), which are parasites or scavengers. Fossil agnathans, covered in an armour of bony plates, are the oldest known fossil vertebrates. They have been dated from the Silurian and Devonian periods, 440–345 million years ago. ...
Jawless fish include 76 species of hagfish and 38 species of lampreys, the two types of fish found in class Agnatha. This is the oldest of the three classes of fish in phylum Chordata. The other classes are Chondrichthyes and Osteichthyes....
Cartilaginous fish is a term that refers to the members of the class Chondrichthyes. This class includes all species of sharks, skates, rays, and chimera. They are differentiated from the fish of class Agnatha, which also has cartilaginous skeletons, by the presence of jaws....
A(n) what is an example of an invertebrate chordate? a. tunicate b. hagfish c. earthworm d. lobe-finned fish List five characteristics that make vertebrates and invertebrates similar. Which phylum is most closely related to the arthropods...
Characteristics of CyclostomataThe body is round and elongated like an eel.The paired fins are absent.Median fins with cartilaginous fin rays.No paired appendages.The
Not frilly; a well-stocked museum that mostly lets its specimens speak for themselves. Sauriermuseum (Aathal) specimen of Plateosaurus: sculpt/cast. A very good, big skeleton of this common dinosaur, rearing up. Rear view of same. Real bones of same; vertebrae and pelvic (this is the “...
PAUL BIENIASZ: They might serve as sort of a breeding ground for the virus to acquire new mutations. HARRIS: That’s because the virus is always mutating. And if one happens to produce a mutation that makes it less vulnerable to the vaccine, that virus could simply multiply in a vaccinate...
this is for a biology paper. what do all vertebrates have but only some invertebrates have? Byanon25565— On Jan 31, 2009 what do all vertebrates have in common with the pattern of their bones in the limbs??? All The Science, in your inbox ...