There are approximately 12 transisthmian shrimps species, called sister species because they cannot interbreed effectively, in the Isthmus of Panama. It is believed that the closure of the Panama resulted to allopatric speciation of the shrimp population within the region.
Answer:
I think B and D
Explanation:
A moraine is a mass of rocks and sediment carried down and deposited by a glacier, typically as ridges at its edges or extremity.
Astronomers have seen stars forming within a nebular cloud. As the nebular cloud condenses and its own gravitational attraction collapses it, heat and energy build up creating a planet.
Unconformity. <span>An unconformity is a buried erosional or non-depositional surface separating two </span>rock<span> masses or strata of different ages, indicating that sediment deposition was not continuous.</span>
