A population of birds has many small variation among the individuals in the population. Variation in beak size among these birds would affect their survival most if the

answer; a male inherits only one allele of the x-linked gene controlling hair color;

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).