1. Although we teach natural selection using a single allele, we recognize that natural selection works...

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Biology

1. Although we teach natural selection using a single allele, werecognize that natural selection works upon the entire phenotype ofan organism, not an individual loci.
About 85% of the human population has a muscle in the forearmcalled the palmaris longus.
a) What is this feature, and what benefit does it provide?
b) Respond to this common criticism of evolution, providingevidence to back your statement:Â Â â€œIf natural selectionis truly working, we should be perfectly adapted to ourenvironment. Thus, if evolution were true, this muscle would not bepresent. Thus, evolution is not true and we should teach scientificcreationism (intelligent design) instead.â€
c) Respond to this common fallacy of evolution, providingevidence to back your statement, â€œIf most humans have this muscle,then obviously there is a benefit for the individuals. We would notwaste energy in making useless structures. Evolution would removethe useless structure from the population.â€
d) Explain the advantages of NOT having this particularfeature.

Answer & Explanation Solved by verified expert

3.6 Ratings (535 Votes)

a Palmaris longus is a superficial muscle in the forearm lying on the medial side of the flexor carpi radialis It arises especially from the medial epicondyle of the humerus and inserts into the palmar aponeurosis It acts to flex the hand It is not present in everyone There is a great variation in the percentage of population having or not having this muscle among the Africans Asians and Native Americans The palmaris longus is one of the five muscles that act a the wrist joint It runs to the palm and activates flexibility at the wrist Research has found See Answer

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