d. Increasing porosity and increasing permeability lead to increased production in an aquifer.
Underground aquifers are permeable geological formations that allow water to accumulate inside the soil. Depending on how water circulates within the soil, there are three primary types of aquifers: porous, karstic and fissural.
In addition to supplying sufficient water to keep surface watercourses stable (production function), aquifers also help prevent their overflow by absorbing excess heavy rainwater (regularization function).
a. Species A survived because of its widespread range including some areas that were not as affected by mass extinction.
The species distribution might confer extinction resistance during massive extinction events. One of the most important reasons for a species -or any other taxonomic group- to survive massive extinction is its wide distribution area.
The broad geographical range of a group -as Species A in the example- enhances the survival chances during mass extinctions. When the event occurs, it severely affects most individuals of a certain area. If the species is restricted to that area, then the species will probably disappear, no matter the number of individuals living there.
But if the species is widely distributed, there are more survival chances. The extinction event will only affect a few regions, but not all of them, meaning that some of the individuals of the species will be able to survive.
Probably as only a few individuals of species A got to survive, they must have suffered the effects of genetic drift after the disaster, causing a reduction in genetic variability.
Planets are massive celestial bodies that orbit a star or stellar remnant. ... Planets may have natural satellites (moons) and may or may not be inhabited. Every planet has a unique infographic, but most of them cannot be interacted with. Travel from planet to planet requires use of the Galaxy Map.