1. A change in allele frequencies in a population over a span of generations is . 2. Evolution that occurs by results in nonrandom reproductive success and adaptive change. 3. Evolution that occurs by results in a change in a population's gene pool due to chance. 4. Evolution that occurs by results in a change in a population's gene pool due to the movement of individuals into and out of the population.

the pic attached shows the stages of mitosis. hope it !

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.

the alkaline earth metals (beryllium (be), magnesium (mg), calcium (ca), strontium (sr), barium (ba), and radium (ra)) are a group of chemical elements in the s-block of the periodic table with very similar properties: shiny. silvery-white. hopefully this ? i didn't fully understand the question