16. and are fossil species with characteristics unique to fish as well as characteristics found in fish and tetrapods. Describe the characteristics of lobe-finned fish that are similar to those of tetrapods.

 Acanthostega and Ichthyostega

Explanation:

The Acanthostega and Ichthyostega are the two different species of fossils that exhibit characteristics that can be found in fish and tetrapods.

The following are the characteristics or features of lobe finned fish that are similar to tetrapods are:

1. Lobe: The teeth are covered with tooth enamel.

2. Fins of lobe:  Finned fish are flexible that support them for movement on land as well.

3. Presence of gills

4. All the body parts are connected with a single bone.

5. Pectoral and pelvic fins are used for articulation of the limbs.

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.