Answer:
Succession to a naturalized grassland from former agricultural land and pastures is accompanied by changes in plant biodiversity and in the soil community. These changes are the result of a reduction or elimination of management, fertilizer applications and of grazing by large herbivores.
B. the reason why scientists do he experiment more than once is because they have to compare the first attempt and the second attempt . Because if they are different they have to figure out what id the different or aka what is different. hope this helps ;)
The correct answer for this question is "shaded square." The symbol that would the horse breeder use to show a male who is affected by a defective gene is the shaded square. <span>Pedigree charts use shaded symbols to show organisms that have a particular trait, such as a defective gene, being traced in the chart. </span>