At first glance, the island rising from the Sea of Cortez appear as barren, rock

Question

At first glance, the island rising from the Sea of Cortez appear as barren, rocky outcroppings. In fact, these biological treasures are teeming with life. The endangered mexican fishing bat (myotis vivesl) lives on these islands, and is found nowhere else in the world. more than 350 species of bats from the same family exclusively on insects, while this one eats fish. The evolution of fishing bets on an island from mainland insect eating bats is an example of which of the following?

A. Allopatric speciation

B. Random speciation

C. Sympatric speciation

D. Zygotic speciation

Explanation / Answer

A. Allopatric speciation

The mechanism of adaptive radiation is known as allopatric speciation, in which one species in particular population differs from all other species (isolated species) and genetic exchange is also prevented among these species. Physical barriers such as a mountain range or long waterways may makes impossible for them to mate. So, these isolated species develop or evolve according to their habitat, because their gene modifications go in that direction (natural selection!).

Disruptive selection is one of the main driving forces of sympatric speciation. Sympatric speciation is different and perhaps it does not exist. It occurs when there are no physical barriers that prevent species to mate together. The occurrence of speciation may be depends on availability of different food sources and existence of different shelters.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.