The principle of dominance is derived from Mendel's conclusions. Which of the following describes the law of segregation? Some alleles of a gene are dominant, and others are recessive
If the recessive allele appears on one of the genes, the offspring will display the trait
Both dominant alleles need to be present for the offspring to inherit the dominant trait
Only 1
1, 2, and 3
2 and 3
1 and 2

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added