Are amphibians that most closely resembles early tetrapod in the body form. a. frogs b. snakes c. salamanders d. toads

The correct answer would be option C. Salamanders.

Explanation:

Amphibians are small vertebrates that need water or a moist environment. These are cold-blooded animals. Amphibians are divided into three classes- Urodela, Anura and Apoda.

Urodela are amphibians with tail such as the salamanders. The salamanders are amphibians who have a tail and early tetrapods in their body.

Anura are amphibians lack tails such as toad and frog. Frog and toads show the larval stage called tadpole with forelimbs only.

Apoda are leg-less amphibians.

Thus, the correct answer is option C.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

the answer is :