1. In chickens, BB calls for a black chicken. WW calls for a white chicken. The BW combination calls for
the blue Andalusian chicken. Cross a blue hen with a blue rooster.
Genotypes
Phenotypes

it is prolly d and c and f

thinking it would be d not too sure but i think it's right

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.