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Biology-Related Homework Help Cell Biology Topic started by: twinkle star on Dec 12, 2022



Title: Evolution is fastest when
Post by: twinkle star on Dec 12, 2022
I think the answer is a. Please can someone check this? thank you!!


Title: Re: Evolution is fastest when
Post by: bio_man on Dec 12, 2022
I believe the answer is (c), since migration into the population needs to be high, and so does the difference in fitness between individuals.


Title: Re: Evolution is fastest when
Post by: twinkle star on Dec 13, 2022
hi, thank you for replying. Please could you explain how difference in fitness between individuals affects evolution? Also, shouldn't variation be high so that evolution is faster as there is lower chance that the animal will be affected by the selective pressure?
thank you!


Title: Re: Evolution is fastest when
Post by: bio_man on Dec 13, 2022
I selected (C) for the following reasons.

Without genetic variation (i.e. low heritable variation), a population cannot evolve in response to changing environmental variables and, as a result, may face an increased risk of extinction.

The more differences exist in a population, the more options natural selection will have when selecting who's fittest to survival, leading to evolution and not extinction.


Title: Re: Evolution is fastest when
Post by: twinkle star on Dec 14, 2022
thank you so much, that makes much more sense! please could you explain what is meant by difference in fitness in individuals is and how it helps evolution? thanks again!


Title: Re: Evolution is fastest when
Post by: bio_man on Dec 14, 2022
Fitness means reproductive success and reflects how well an organism is adapted to its environment. High fitness means more likely to adapt when nature selects who's most fit to survive. Does that help?


Title: Re: Evolution is fastest when
Post by: twinkle star on Dec 15, 2022
yes that helps a lot! thank you very much!!