They are measuring the liquid's VISCOSITY
The answer is C. The dominant trait will be present in all cells in a Punnet Square, meaning the dominant trait will be shown in the entire F1 generation, but if an offspring from the F1 generation mates with a parent with only recessive traits (aa), it will create one offspring in the F2 generation that will have the recessive trait showing. Ex: F1: Aa - other parent: aa.
It can affect the size of populations by seeing which population is adapted in those conditions and which population can not adapt fast enough their population will decrease unlike another population that adapted faster their population will increase
Answer:
c. all matter has an attractive force that is dependent on its mass