The muscles in the human body that are connected to bones and aid in the movement of the skeleton are called skeletal muscles. These muscles are connected to bones by tendons. Within each of the skeletal muscles are bundles of muscle fibers. These bundles are also called fasciles. Each skeletal muscle fiber contains many myofibrils, which are rod-shaped and contains many sarcomeres (the functioning unit of muscle tissue.) Sarcomeres are made up of thin filaments (composed mainly of the protein ) and thick filaments (composed mainly of the protein .) The actin of the outermost myofibril is connected to the cell membrane by a protein called .

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

answer; ///stratum basale///stratum spinosumstratum granulosumstratum lucidumstratum corneum; 2,1,5,4,3