Use the following information to answer the next question regarding the Grolar bear. "It's
important to recognize that polar bears branched off of grizzly bears rather recently in
evolutionary terms," Kelly says, "and when a species splits into two it doesn't happen overnight.
It takes a period of isolation for them to evolve differences, and it often takes an even greater
period of isolation for them to become so different that they can't hybridize if they re-encounter
one another. So this happens over and over and over again in evolution. It's really sort of the
basis of the Darwinian theory." Kelly invokes the famous illustration from The Origin of Species
of the branching tree. "What it doesn't show is that sometimes those branches grow back
together," Kelly says. "[Darwin] was, and rightfully so, focused on the creation of new species,
but sometimes after a period of separation, species that were beginning to diverge come back
together and fuse and return to being one species. And this may very well be where polar bears
and grizzly bears are headed. (But of course this is evolution so it's not determinate.)" (Holland,
2018 Pacific Standard Magazine) 6) The discovery of Ursus maritimus x Ursus arctos (Grolar
bear) in the wild has the potential to spark a debate on whether polar bears and grizzly bears are
considered different species. Current estimates state that polar bears and grizzly bears diverged
from a common ancestor between 130,000 and 250,000 years ago. Develop a stance and use
knowledge you have gained in this class to discuss whether they should remain listed as separate
species or should be moved to sub species of one large group of bears. (5).
Use the following information to answer the next question regarding t.pdf
1. Use the following information to answer the next question regarding the Grolar bear. "It's
important to recognize that polar bears branched off of grizzly bears rather recently in
evolutionary terms," Kelly says, "and when a species splits into two it doesn't happen overnight.
It takes a period of isolation for them to evolve differences, and it often takes an even greater
period of isolation for them to become so different that they can't hybridize if they re-encounter
one another. So this happens over and over and over again in evolution. It's really sort of the
basis of the Darwinian theory." Kelly invokes the famous illustration from The Origin of Species
of the branching tree. "What it doesn't show is that sometimes those branches grow back
together," Kelly says. "[Darwin] was, and rightfully so, focused on the creation of new species,
but sometimes after a period of separation, species that were beginning to diverge come back
together and fuse and return to being one species. And this may very well be where polar bears
and grizzly bears are headed. (But of course this is evolution so it's not determinate.)" (Holland,
2018 Pacific Standard Magazine) 6) The discovery of Ursus maritimus x Ursus arctos (Grolar
bear) in the wild has the potential to spark a debate on whether polar bears and grizzly bears are
considered different species. Current estimates state that polar bears and grizzly bears diverged
from a common ancestor between 130,000 and 250,000 years ago. Develop a stance and use
knowledge you have gained in this class to discuss whether they should remain listed as separate
species or should be moved to sub species of one large group of bears. (5)
![Use the following information to answer the next question regarding the Grolar bear. "It's
important to recognize that polar bears branched off of grizzly bears rather recently in
evolutionary terms," Kelly says, "and when a species splits into two it doesn't happen overnight.
It takes a period of isolation for them to evolve differences, and it often takes an even greater
period of isolation for them to become so different that they can't hybridize if they re-encounter
one another. So this happens over and over and over again in evolution. It's really sort of the
basis of the Darwinian theory." Kelly invokes the famous illustration from The Origin of Species
of the branching tree. "What it doesn't show is that sometimes those branches grow back
together," Kelly says. "[Darwin] was, and rightfully so, focused on the creation of new species,
but sometimes after a period of separation, species that were beginning to diverge come back
together and fuse and return to being one species. And this may very well be where polar bears
and grizzly bears are headed. (But of course this is evolution so it's not determinate.)" (Holland,
2018 Pacific Standard Magazine) 6) The discovery of Ursus maritimus x Ursus arctos (Grolar
bear) in the wild has the potential to spark a debate on whether polar bears and grizzly bears are
considered different species. Current estimates state that polar bears and grizzly bears diverged
from a common ancestor between 130,000 and 250,000 years ago. Develop a stance and use
knowledge you have gained in this class to discuss whether they should remain listed as separate
species or should be moved to sub species of one large group of bears. (5)](https://image.slidesharecdn.com/usethefollowinginformationtoanswerthenextquestionregardingt-230328123642-3ff0c79c/85/Use-the-following-information-to-answer-the-next-question-regarding-t-pdf-1-320.jpg)
