Answer:
Population control, or a limitation on how many children you are allowed to conceive, significantly affects the population number by lowering it. Also, factors such as social pressure can be a determining factor as well. If you have more than the "normal" amount of kids, or whatever is considered "normal" in a community can cause gossip, rumors, and eventually, the rumors will take over a person and he or she will not want to be viewed as a "freak" and will most likely want to stop conceiving children, causing the population to lower.
Explanation:
Hand Hygiene.
Washing your hands has been proven to be the most effective means of stopping infectious disease spread, in the history of.... forever.
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The heads of the phospholipids, which are positioned outwards on both layers, are hydrophilic. The trails of both layers are hydrophobic and face inwards, and protected by the outer layers.
Individual with genotype AaBBCC has the dark skin colour.
Explanation:
The skin colour is a polygenetic trait i.e two or more genes control the particular characteristic in an individual.
The amount of gene in the individual in such cases would determine the skin tone.
It is given that dominant alleles are responsible for darkest colour of the skin in the example. We could see that the genotype AaBBCC has maximum dominant alleles which makes us to deduce that individual with this genotype will have dark skin phenotype.
This quantitative occurrence of alleles in the individual decides its skin colour and variations in it.
The genes are independent of each other but have an additive effect on the phenotype like skin colour.