Answer:
Polygenic inheritance is determined by multiple Genes located at different loci on different chromosomes.
Polygenic inheritance happens when an individual posses quantitative traits that become a variation compared to the parent's traits.
This phenomenon happens due to the combination of two or more genes that resulted in the characteristics that considered as the combination of both parents' characteristic.
Explanation:
The type of mutation that occurred would be a deletion.
Many small and medium sized species, assume sunning postures in which they squat or sit with their feathers slightly erected and wings drooped.
Plants are NOT heterotrophs. Heterotrophs are organisms that cannot produce their own food; generally these are animals.
The correct answer is a nutrient runoff.
Nutrient runoff is a major reason for eutrophication of surface waters, in which extra amount of nutrients, generally phosphorus or nitrogen, instigate growth of algae. Sources of nutrient pollution involve surface runoff from pastures and farm fields, emissions from combustion, and discharges from septic tanks.