Asked by Cally Harlin on Jul 08, 2024
Verified
The vertebrate jaw first appeared in which organism?
A) fishes
B) amphibians
C) reptiles
D) birds
E) mammals
Vertebrate Jaw
A structural feature found in vertebrates that is composed of bony or cartilaginous structures surrounding the mouth, utilized for biting, chewing, and manipulation of food.
Amphibians
A class of cold-blooded vertebrates that live both in water and on land, such as frogs and salamanders.
Fishes
Aquatic vertebrates that have gills throughout life and limbs, if any, in the shape of fins.
- Acquire knowledge on the crucial role of anatomical traits in vertebrate evolution.
- Become acquainted with the evolutionary bonds shared by fish, amphibians, reptiles, birds, and mammals.
Verified Answer
NR
Nicole RobinsonJul 13, 2024
Final Answer :
A
Explanation :
The vertebrate jaw first appeared in fishes, specifically in the class Agnatha (jawless fishes) about 500 million years ago.
Learning Objectives
- Acquire knowledge on the crucial role of anatomical traits in vertebrate evolution.
- Become acquainted with the evolutionary bonds shared by fish, amphibians, reptiles, birds, and mammals.