We can confirm that a person with very toned muscles likely has tightly packed myofibrils.
<h3>What are myofibrils?</h3>
These fibers are the protein filaments that cause contractions in the structure of the muscle. Weight training tones muscles by increasing the number of myofibrils in a sarcomere, thus increasing its capacity to produce force.
Therefore, we can confirm that a person with very toned muscles likely has tightly packed myofibrils.
To learn more about muscle fibers visit:
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Three reasons a species could become extinct include, deforestation, being overhunted, not enough food available.
"Human height is determined by several genes located on different chromosomes" is the one among the following choices given in the question that <span>is an example of a polygenic trait. The correct option among all the options that are given in the question is the fourth option or option "D". I hope it helps you.</span>
I think it is C but i am not completely positive.<span />
