A pyroclastic flow is a dense, fast-moving flow of solidified lava pieces, volcanic ash, and hot gases. It occurs as part of certain volcanic eruptions. A pyroclastic flow is extremely hot, burning anything in its path. It may move at speeds as high as 200 m/s. Pyroclastic flows form in various ways.
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Your answer would be B. individuals moving into a population.
Imagine you live in a small village that is remote and hasn't had much contact with people from different geographical areas or other continents even. Your community will have a certain gene pool as each individual has certain genes and when the genes of every person are taken into account this leaves us with certain genes that perhaps aren't found somewhere else. Suddenly, there is a big influx of another group of people coming from one particular region with a somewhat different gene pool to this community.
After some time, these people will reproduce and create new children who will have a more diverse gene pool (if the people from the old and new community would make babies for example). This is how the gene pools would get expanded and also gene flow would occur.
Answer:
The thoracic cavity is SUPERIOR to the abdominopelvic cavity.
The answer is SUPERIOR
Explanation:
Answer:
Option B, Mammals and reptiles in the post-dinosaur age.
Explanation:
Adaptive radiation is mechanism through which species evolve very fast from common single ancestors. In simple words two different species are said to have evolved through adaptive radiation when they have descended from a single lineage. This is not the case with mammals and reptiles.
Generally in adaptive radiation, a species evolve when it faces new environmental challenges due to change of habitat or area. For example mammals have evolved from dinosaurs.
Hence, option B is correct
Answer:
False
Explanation:
Indoor pollution is rather more dangerous and is caused by harmful chemicals. Due to restricted area, the density of the pollutants is higher indoor, and thus, they are build up more inside.
