<span>A) only three house flies were collected for an experiment
</span><span>Errors are what makes your measurement invalid and unreliable. There are two types of error which is called the systematic error and the random error. Each error has different sources. Words that were mentioned –invalid and unreliable are very important key aspects to determine that your measure is truly accurate and consistent. Some would recommend using the mean method, doing three trials in measuring and getting their mean, in response to this problem.</span>
1. May be due to a mutation in the allele coding for white colour, which results in an allele coding for yellow colour in the flowers.
2. The original white flower that was isolated may have been heterozygous, Ww, where W codes for the white pigment in flowers, and W is dominant to w. The crossing of Ww × Ww will give offspring with genotypes of WW, Ww, Ww, ww, genotypic ratio of 1:2:1, and phenotypic ratio of 3 white :1 yellow. The offspring with the yellow flowers has a genotype of ww, homozygous recessive.
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Answer:
Wegner proposed the theory of Continental Drift (Pangea). Continental Drift is a theory that at one time, all of the continents were stuck together in this one giant land mass. They drifted apart slowly and formed into our modern day world. Hope this helps!