The Regions of the distinctly different physical areas that has serve as the boundaries between the different communities are called as ecotone
An ecotone is the transition area between the two biological communities, where the two communities must meet and integrate. It may be the narrow or wide, and it may be the local ("the zone between a field and forest") or regional ("the transition between forest and grassland ecosystems").
The Ecotones are the areas of the steep transition between the ecological communities, the ecosystems, and/or ecological regions along with the environmental or other the gradient. Ecotones may occur at multiple spatial scales and the range from the natural ecotones between the ecosystems and biomes by the human-generated boundaries
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The answer is “Variation that decrease reproductive success are more likely to be passed on.”
The layer which protects the earth is referred to as magnetosphere.
Magnetosphere is termed as the region of space which surrounds astronomical object by way of magnetic fields.
They create planets which generates planets in magnetic field which include fields where they can occur in stars through interaction of plasma.
Magnetosphere blows away particles from the earth and also from the sun.
The answer should be B because the central nervous system is the spinal cord and brain.
<span>The relative age of a rock layer is the age of the rock compared to the ages of the rock layer while the actual age of the rock layer is the actual number of years that the rock was formed. The relative age of a rock is generally determined by geologists using the Law of Superposition where the youngest rock is at the top and the oldest rock is at the bottom of the horizontal layer. The actual age of a rock is generally determined using Radiometric Age Dating method that is based on the natural radioactive decay of rock elements.</span>