In developed countries , amount of food produced being increased is a positive effect of agricultural changes in the past century.
Agricultural changes in developed countries were set up such as application of fertilizers etc so as to achieve a maximum yield as the increasing population all over the world means increase in food production to cater for individuals and to prevent starvation and death.
Agricultural changes were also done to ensure goods produced have a very high quality.
The remaining options such as Desertification, Clearing of rainforests and contamination can be referred to as part of the negative effect of agricultural changes in the past century.
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Answer:
Human blood type exhibits codominance as well as normal Mendelian inheritance (known as dominant/recessive)
Explanation:
Neither the A gene nor the B gene is dominant to the other. They both share in the phenotype AB blood type. Think of co-captains of a team sharing responsibilities.
A and B are both dominant to O which is recessive. If a person inherits A & O they have blood type A. Likewise, if a person inherits B & O they have blood type B. Only if they inherit O & O (homozygous recessive) will they have type O blood.
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