If the child is born with blue eyes, would the pair of alleles the child carries be homozygous or heterozygous? can blue eyes ever be heterozygous?

Having blue eyes is a recessive trait. Blue eyes will almost always result in two recessive, homozygous alleles (bb). Eyes are a bit complicated though, because 7% of people with blue eyes have heterozygous alleles. So basically, the general rule is that most children born with blue eyes have homozygous alleles, but their are rare genetic possibilities. I’m not an expert on this and mainly just trying to recall what I learned in 7th grade science, so I hope this helps. :)

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.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.