the only possibilities for the childrens genotypes are; A and AB, so the fact that the child has a blood type of O isn't possible
No they can... But if you talk to your plants it helps they stay healthy because of the oxygen you are giving them.
Experiments in general are more reliable when a greater sample size is used. When using a small sample size, a mistake or fluke can greatly effect the outcome of the experiment. With a large sample size, there is more data to understand averages and deviations to the average data. The average will likely be more accurate with more data, which would make his sample size more reliable.
Clear-cutting is the most common method of timber removal. Clear-cutting removes all the trees in a given area, often by using large machinery. From an economic standpoint, the benefit of this approach is that humans can harvest maximum timber with minimal energy and cost.
Breaking down material such as rocks and wood
