Homologous structures can be best described as structures that are so similar that they imply a common ancestor.
Homologous structures are structures that can be found in different species and are similar in structure but may not necessarily have similar function. The presence of these similar structures indicates that the species evolve from a common ancestor. Examples of homologous structures are the forelimbs of bats and humans which have different functions but the same basic skeletal structure. This suggests that bats and humans share a common ancestor.
Earth changes all the time, making it a <u>dynamic </u>planet.
Answer:
The correct answer is myofibrils
Explanation:
The fundamental part of the muscle cytoskeleton is made up of myofibrils that are the contractile elements of skeletal muscle cells.Muscle fibers are made up of myofibrils, membranes, and cytoskeletal networks that anchor contractile fibrils to the sarcolemma. Myofibrils are composed of repeating contractile units known as sarcomeres and are perhaps the most ordered macromolecular structures in eukaryotic cells. Myofibrils are made up of actin and myosin filaments that are large polymerized protein molecules responsible for actual muscle contraction.