Answer:
Energy Pyramid Definition. An energy pyramid (sometimes called a trophic pyramid or an ecological pyramid) is a graphical representation, showing the flow of energy at each trophic level
Explanation:
New crust is formed on the opposite end of the plate as it pulled away from.
3 examples are-
1.ice wedging - when water gets into cracks, freezes and expands
2.roots-while they grow, they push rocks aside that later break.
3.animals- when they dig underground, they push rocks aside causing them to break
Over the years, greater controversy has arisen over environmental issues as the issues addressed have become more complex and less easily identifiable.
Answer:
Natural selection or genetic drift
Explanation:
Natural selection and genetic drift are two different evolutionary mechanisms that can lead to speciation. This is, to the origin of two species from a single species (the common ancestor).
Allopatric speciation is a type of speciation where emerging species arise after an ancestral population is divided by a geographical barrier preventing contact and therefore gene flow between individuals of split populations. The split populations eventually could become new species.
Natural selection occurs when the split populations changes genetically due to environmental pressures. The genetic drift occurs when the genetic changes are due to random sampling of organisms.
