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Biology 21 Online
OpenStudy (anonymous):

@Abhisar Which process is not influenced by natural selection? A. geologic time scale (I think its that one) B. speciation C. biological inheritance D. evolution

OpenStudy (abhisar):

okay temme why do u think so ?

OpenStudy (abhisar):

why it can not be C ?

OpenStudy (abhisar):

??????

OpenStudy (anonymous):

I think that because time does not help the organism become adapted to their environment

OpenStudy (abhisar):

ok i think u r correct but let me be sure

OpenStudy (abhisar):

@Data_LG2

OpenStudy (anonymous):

ok

OpenStudy (abhisar):

@surjithayer

OpenStudy (abhisar):

@Whitemonsterbunny17

whitemonsterbunny17 (whitemonsterbunny17):

I would say that A is correct. (:

OpenStudy (anonymous):

ok thanks @whitemonsterbunny17

OpenStudy (abhisar):

Thankyou @Whitemonsterbunny17 \(\huge\ddot\smile\)

whitemonsterbunny17 (whitemonsterbunny17):

Haha no problem!! *^.^*

OpenStudy (anonymous):

I have another question. @Abhisar

OpenStudy (abhisar):

yest post it as new

OpenStudy (anonymous):

ok one min :)

OpenStudy (anonymous):

@Okay, it is A.

OpenStudy (abhisar):

Thankyou @mrdoldum \(\huge\ddot\smile\)

OpenStudy (abhisar):

but how natural selection effects biological inheritance ?

OpenStudy (anonymous):

Opps, no @ okay lol. B is wrong because natural selection can result in speciation. This is because selection creates bias in the fitness of individuals in a population. C-If there was no selection then inheritance would be a non-factor. This is because there would be no bias in the fitness effects. For fitness effects to take place there must be inheritance. D-evolution is a theory that currently explains the observed data on all organisms the best. A key part of evolution is the changes in allele frequencies over time based on random (mutations and genetic drift) and non-random allele frequencies (natural selection).

OpenStudy (anonymous):

@slk555 @Abhisar See above post.

OpenStudy (abhisar):

so u can say that natural selection is influenced by inheritance but the question asks reverse

OpenStudy (anonymous):

@Abhisar @slk555 Rates of inheritance of alleles in a population change, based on part, by selection. Also, there are actually a few acquired traits that a species can actually pass on to young.

OpenStudy (abhisar):

@mrdoldum i am not able to get u....how natural selection affects biological inheritance ?

OpenStudy (anonymous):

@Abhisar Part of BI is the mere ability to pass genetic info on, the other part is the pattern of inheritance. This second part is where NS acts. NS alters the the rates of inheritance of alleles from one generation to the next. One example is sickle cell anemia. Having two faulty alleles = death having only 1 = partial traits of sickle cell but increased malaria resistance. This is why sickle cell is maintained in wet environments with high malaria rates but is purged from a population with very low malaria rates.

OpenStudy (abhisar):

Hmmm...i got it..u r correct...!

OpenStudy (anonymous):

@mrdoldum makes sense now thanks!

OpenStudy (abhisar):

Thanx once again @mrdoldum !

OpenStudy (abhisar):

He always @slk555 \(\huge\ddot\smile\)

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