After holding the weight for so long, the muscle would get tired, in an effort to tell the brain to stop holding the weight because the muscle fibers cannot handle it any more. Lactic acid is a by-product during muscle contraction that leads to the pain.
Pretty sure its truth / no edit here
Protocells are self-organized, spherical collection of lipids. This is the proposed as the stepping stone to the origin life. One of the important qualities of protocells is its self-replicating, using the amphiphilic molecules. This requires repeatable set of chemical events.
The traits on the <span> particular chromosome be determined as the g</span>enetic traits contained within the DNA of chromosomes are determined by combining 1 of each type of chromosomes from each parent. I hope the answer will help you. Thank you for posting your question here.
It is the iris, it <span>surrounds the pupil. Light goes into the eye and the iris regulates the amount of light by controlling the size of the pupil.</span>
i hope this helps
