Answer:
B. Solution
Explanation:
According to the question statement, Susan wrote in her notebook that it was a blue liquid. Therefore, from a chemistry point of view, it was a solution and not a heterogeneous mixture. Then, the solvent was evaporated after leaving the solution for 72 hours at the windowsill. The solute (blue color most likely) however was not able to evaporate with solvent and left behind.
Example: if you leave the KMnO4+water solution for a few days, water will evaporate thus leaving behind purple crystals of KMnO4.
<span>The tympanic membrane or eardrum is a membrane in the ear that vibrates when hit by sound waves.It is tightly stretched and separates the ear canal from the middle ear. When sound waves hit the tympanic membrane, it vibrates. these vibrations are then passed to the middle ear, which consist of the ossicles or ear bones. </span>
During episode 7 of "Cosmos: A spacetime odyssey", Clare Patterson thanks the scientist who have come before him, among these, he mentions Charles Lyell and Michael Faraday.
Cosmos was a popular television science documentary series. Episode 7 titled "The Clean Room", explored the work of Clare Patterson and during said episode, as he awaits the sample from the spectrometer, Patterson proceeds to give thanks for the advancement of science by those who have come before him.
Patterson states that he wishes to give thanks to scientists who have come before him and proceeds to mention names such as:
- J. J. Thomson.
- Ernest Rutherford
- Harrison Brown
- Charles Lyell
- Michael Faraday
all of which were renowned scientists with great contributions to the knowledge we possess today. He ends the thank you by stating that they now know the age of the Earth and with a symbolic "We did it."
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Answer:
Phenotypic ratio= 1:1
Genotypic ratio = 1:1
Explanation:
This is a monohybrid cross involving a single gene that specifies a color phenotype.
According to the question, WW, which is homozygous dominant i.e same allele is white while ww, which is homozygous recessive is black.
Hence a genotype Ww will possess a white phenotype since the W allele will mask the expression of w.
In a cross between a female and male with a a Genotype Ww and ww respectively. The parents alleles will be separated into gametes according to Mendel's law of segregation. (See attached image).
Ww will produce gametes W and w
ww will produce gametes w and w
The four possible offsprings will have Ww (2) and ww (2) genotypes. Hence two of them will be white while two will be black.
Hence, the phenotypic ratio will be 1:1 while the genotypic ratio will also be 1 Ww: 1 ww