C. Law of superposition because it is the principle that the oldest layer of sediment will be found on the bottom
The correct answer for this question is this one:
Given that there are 30 people, then there are 60 alleles. 10 of these people are not tasters. So, there are 20 of those 60 are t alleles. So, 40 alleles are left, but of a mix of t and T. It said in the lesson text that people who can taste this have at least one dominant gene "T". So it could either be homozygous (T,T) or heterozygous (T,t or t,T). People with homozygous recessive genes (t,t) can't taste it.
Because gm crops can't replace everything. yes even they can make a better species and increase the productivity, but some countries or farmers might not have the technology to replace all the crops with gm crops, and they still have to rely on chemical fertilisers. chemical fertilisers can be deadly as if u overuse them, it can pollute the water and leading to euthrophication, where it can kill sea animals
The correct answer to the top one is B
