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Kisachek [45]
3 years ago
6

Several species of leopard frogs are common throughout North America, where their ranges overlap. Different species of leopard f

rogs are very similar in appearances, but the males of each species have a unique courtship call. How did speciation most likely occur in leopard frogs?
A- Reproductive isolation occured through behavioral isolation
B- Reproductive isolation occured through temporal isolation
C- Populations were separated through geographical isolation
D- Populations were separated through competition
Biology
1 answer:
MrMuchimi3 years ago
4 0

the correct answer is A- Reproductive isolation occurred through behavioral isolation

A process of formation of a new species from an existing species is called speciation. New species may formed due to geographical or reproductive barriers which isolates the members of a population of a species to form a new species.

In the given question, speciation in In the leopard frogs occurred due to a particular or specific call given by males to the females. The courtship call lead to reproductive isolation due to change in behavior. Such type of behavioral change will help in recognizing mates of the same species and this will act as a reproductive barrier among the other related species.


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3 years ago
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d1i1m1o1n [39]
Oh this one is so cool!

It basically all boils down to Vitamin D! We need this essential vitamin to help our body build hormones and regulate calcium. Our bodies make Vitamin D when we are exposed to the UV rays found in sunlight. But as we all know, too much sunlight isn’t good because these UV rays can harm us. Melanin (the chemical that our bodies produce to darken skin tone and hair color) provides protection from UV rays by absorbing them. However, this means that the more melanin that is produced by someone’s body results in less absorption of UV rays and a decrease in Vitamin D production. But for someone living around the equator or in the tropics that doesn’t matter because there’s lots of sun all the time. So for humans living in these areas where there’s lots of sunlight year round, it’s beneficial to have darker skin to protect from the harm of UV rays. People living in these areas still get plenty of Vitamin D though because of that year round sunshine.

Now what about those who’s skin has less melanin, such as those found in the higher latitudes? Well with less sunlight year round, their bodies had to adapt to be able to get enough Vitamin D. So less melanin is produced by the body in order to absorb the lesser amounts of UV rays to make Vitamin D. Lighter skin is, therefore, more beneficial the farther away you go from the tropics.

So essentially:
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Con of Darker Skin tones
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Con of Lighter Skin tones
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This is of course the biology answer. The social impacts of different skin tones is a whole different story that you can ask in the history section.
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