I would say that the answers are: 'large variation' and 'smaller'. A population of finches with a large variation in genotype, and therefore phenotype, for beak size would allow the population to adapt to changing food availability. The increase in small seeds within their environment would provide a selective advantage to individuals with smaller beaks, as they would be more deft at handling the seeds.
The answer is; Basalt rock
This type of rock is dark-colored due to the high content of magnesium and iron from the lava that forms it. Extrusive basalt rocks are fine-grained due to the rapid cooling of lava on the earth's surface. The basaltic lava is usually of low viscosity to the low silica content. Therefore , this lava flows greater distances before cooling. Basalt comprises approximately 90% of volcanic rocks on earth.
White blood cell classification
Answer:
The traits an organism displayed are ultimately determined by the genes it inherited from its parents.