Answer:
A tan might indicate sun damage to the skin.
Explanation:
Tanning is the process by which the skin is exposed to the ultraviolet rays that comes from the sun with the purpose of producing a dark-brown coloration called a TAN.
A tan achieved by exposure to the sun can actually indicate that a person's skin is undergoing damage from the UV rays of the sun, hence, the skin responds by producing a protein called melanin, which protects the skin and later forms the dark coloration- tan. From this explanation, tan is got in response to a damaging signal received by the cell, hence, a tan might indicate sun damage to the skin.
It can be replicated by other experimenters and yield the same results shows the quality of a successful scientific experiment.
<h3>What is Scientific Experiment?</h3>
A scientific experiment refers procedure that is carried out in a building inorder to support or against an hypothesis or to determine whether the existence of something that has not been tried or it's efficacy.
This give insight about cause or effect of something by manipulating one of the factors.
Therefore, It can be replicated by other experimenters and yield the same results shows the quality of a successful scientific experiment.
Learn more about scientific method fro the link below.
brainly.com/question/8691391
Answer:
d. Tryptophan would bind to the repressor
Explanation:
However,the repressor would not be able to bind to the operator and switch off transcription.The cell would still be making tryptophan even though it is being supplied by the medium in which it is growing.This is a waste of energy.
Answer:
A forecast with a large cumulative sum of forecast errors
Explanation:

1) Fine flour and lumpy flour - B) Sieving
2) Mixed nuts - A) Handpicking
3) Sand and gravel - B) Sieving
4) Sand and palay - B) Sieving
5) Scrap iron and nail - C) Using magnet
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