Answer:
The drum skin oscillates 20 times per second
Explanation:
The frequency of a note is dependent on the mechanical activities that occur when it is produced. A drum is beaten in this case. The oscillation of the drum skin transfers sound waves to the air particles which move at the same frequency before reaching our ears.
If the frequency of the sound wave is 20 Hz this means that the wave is oscillating 20 times in one second. For the drum to produce such a sound, the skin must have been oscillating at the same frequency of 20 oscillations per second too.
The validity of the hypothesis cannot be confirmed or refuted from only one experiment. By using a series of experiments, the human error or measurement error is reduced to a minimum. Furthermore, more than one factor can be used to determine the validity of the hypothesis.
I will respond to this student that the experiment needs to be repeated multiple times before a conclusion can be drawn! Also, the data will refute or confirm the validity of the hypothesis and not the researcher's own opinion/rational.
Answer:
The genotype of parents for 6 exceptional cross was
Bb * bb
Result for crossing the black and white guinea pigs from the 6 exceptional cases.
Bb * bb
Bb, Bb, bb, bb
Explanation:
Here trait for black guinea is dominant over the trait for white guinea
There is a possibility that for remaining 6 crosses, the genotype of parents would be as follows
Black guinea pig - Bb
White guinea pig - bb
Now when these two genotypes are crossed the following offsprings are produced
Bb * bb
Bb, Bb, bb, bb
Thus, out of four offspring half of them are heterozygous black and remaining half of them are white in color.
Now if these black and white guinea pigs from the 6 exceptional cases with genotype Bb and bb are crossed respectively, then following offspring are produced
Bb * bb
Bb, Bb, bb, bb
Answer:
Changes is macro molecule structures are expected among other things
Explanation:
If there were a wold that was based on a small non-polar lipid instead of water there would be massive changes to proteins and carbohydrates. Basic changes would include solubility, catabolism and metabolism and absorption in organisms.
Many water soluble material would no longer be mobile because there is a lack of media in which to dissolve. However other fat soluble material will be highly mobile and well absorbed. Sessile organism such as trees that depend on nutrients that are dissolved in water for absorption will not longer have this ability.
Finally, abiotic factors such as rainfall and rock weathering will be influenced. The freezing of polar caps and melting of ice will no longer be occurring and there will be an influx of an medium that does not evaporate. Because of this there will be the cessation to the water cycle and probably the end of this life on earth without quick evolutionary and adaptive changes.
