<span>The answer is letter b. Human activities have polluted most of the fresh water supply that is fit for consumption. Letter b. explains the reason behind the water shortage which we are facing today, which is human activities have polluted most of the fresh water supply that is fit for consumption.</span>
Answer:
Law of segregation
Explanation:
Mendel's law of segregation states that alleles of a gene get separated into gametes during meiosis. He discovered this law when he crossed a homozygous tall plant with a homozygous short plant. He noticed that all the F1 offsprings were tall. He then self-crossed the F1 offsprings to produce a phenotypic ratio of 3:1 in the F2 generation.
In this test cross, a dominant plant with green pod was crossed with a homozygous recessive plant with yellow pods. This cross was conducted to determine the genotype of the dominant parent. The result showed that the parent is heterozygous (Gg) because a 1:1 phenotypic ratio was obtained i.e. 1 Green pod plant: 1 yellow pod Plant.
This illustrates what Mendel discovered in his law of segregation that each allele will get separated into the gametes. In this case of Gg plant, G and g alleles will get separated into gametes. Although the g allele was masked but it will get separated into gametes, which will fuse with another recessive gamete from the homozygous recessive parent (gg) to produce a homozygous recessive offspring.
Sam drives an excavator at an open surface strip coal mine. He has the most tendency to collect the lignite coal which is found in the outermost surface of the earth.
<h3>
What is Lignite?</h3>
The brown coal known as lignite, which is found in the topmost layer of the earth's crust, is frequently referred to as such and is essential for commercial use due to the fact that these coals are the only ones used for the majority of applications.
Electricity produced from lignite is plentiful, affordable, dependable, and environmentally friendly. Lignite is a flammable mineral that ranges in color from dark brown to black and was created over millions of years by the partial decomposition of plant matter under conditions of elevated pressure and temperature in an atmosphere devoid of air.
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Answer:
2. macroevolution
Explanation:
Macroevolution refers to the evolutionary processes that lead to the appearance/extinction of groups larger than individual species. Macroevolutionary processes include speciation, species selection and punctuated equilibrium. The punctuated equilibrium processes are represented by phenomena such as those cases described above. These evolutionary processes are concentrated in relatively short speciation phases caused by bursts of evolutionary changes, which are then followed by stages characterized by evolutionary stasis.