Why have populations of many ray -finned fish species decreased in recent years?
A) Parasitism by lampreys
B) Bacterial disease
C) Pollution of their environment
D) Overfishing by humans
E) Loss of their prey species
Correct Answer:
Verified
Q32: A(n)_ protects the internal organs of ray-finned
Q33: Why are lampreys classified as vertebrates?
A) They
Q34: Most _have swim bladders.
A) jawless fishes
B) ray-finned
Q35: Fins composed of rod-shaped bones surrounded by
Q36: Lampreys differ from other vertebrates because they
Q38: A shark is a(n)
A) invertebrate chordate.
B) jawless
Q39: Lungfishes are classified as
A) cartilaginous fishes.
B) ray-finned
Q40: The skeletons of rays and skates are
Q41: Which vertebrate group has a three-chambered heart?
A)
Q42: Amphibians are not especially successful land -dwellers
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents