To ground his theory, what did charles darwin do?

a)developed a comprehensive theory of inheritance.


b)described several evolutionary changes and identified the


agents that caused them.


c)used patterns of domestication to show how his theory


differed from those patterns.


d)assembled a broad base of supporting information from


many fields.


e)developed a mathematical model of evolutionary change.








is it b or d? and why? thanks!


also:


Which statement about allele frequencies is not true?


a. The sum of any set of allele frequencies is always 1.


b. If there are two alleles at a locus and we know the fre-


quency of one of them, we can obtain the frequency of


the other by subtraction.


c. If an allele is missing from a population, its frequency


is 0.


d.If two populations have the same gene pool for a locus,


they will have the same proportion of homozygotes at


that locus.


e. If there is only one allele at a locus, its frequency is 1

To ground his theory, what did charles darwin do?
a)developed a comprehensive theory of inheritance





That would be natural selection. It is neither b nor d:


b) He didn't identify agents that cause evolutionary changes for each individual change. Natural selection is one* theory that can explain most evolutionary changes.


d) He didn't use information from many fields.











d. If two populations have the same gene pool for a locus, they will have the same proportion of homozygotes at that locus.
Reply:It is B because charles studied beak length of birds on the Galpogas islands at sea level and in the mountains and on the other different islands and realized that these birds all were the same except that their beals grew or shrunk depending on the food that they had on the island. i.e.- one type of bird would have a longer beak because the type of insect that they eat burroghs in trees, therefore making the bird have to get it out
Reply:So when you have trouble with MC questions, go through the answers one at a time, and try to recall everything you know about the parts of each possible answer.





Here we go...





a - developed a comprehensive theory of inheritance - You know that this is incorrect because Mendel was the guy who developed our original understanding of the mechanism and pattern of inheritance. Darwin guessed on this and got it wrong in the Origin of Species.





b - described several evolutionary changes and identified the agents that caused them - At this time, Darwin was really speculating on evolutionary changes and their selection pressures, rather than specifically identifying them. For instance, this answer would imply that he studied the finches on the Galapagos long enough to quantify how changes in food availability affected beak shape, etc. In The Origin, Darwin needed to show *how* the changes might occur over time, and identifying selection pressures alone wouldn't do that.





c - used patterns of domestication to show how his theory differed from those patterns - This is an intentionally misleading answer, intended to see if you're paying attention. Actually, Darwin used domesticated breeds to show how *similar* the results of artificial selection could be to those of natural selection. A little sneaky...





d - assembled a broad base of supporting information from many fields - So the Origin of Species took Darwin decades to write in large part because he spent so long accumulating evidence from fields such as anatomy, geology, behavior, ecology, paleontology (a new field at the time really), and so on. In other words... this is right.





e - developed a mathematical model of evolutionary change - The question is hinting at the Hardy-Weinberg equation, which was developed... errr... not by Charles Darwin. :)





Normally I don't help students with what are obviously homework questions, but in light of the bad advice you were collecting, I thought I'd chime in. That all said, you know that there's no reason you couldn't answer this question yourself.
Reply:In the Biology textbook that I have it says, "When Charles Darwin developed his theory of natural selection in the 1800s, he did so without knowing about genes." And so it wouldn't be "b" or "d" at all, it would be "a".





For the second question the correct answer is "d".
Reply:hmmm I know that Darwin bred birds (um can't remember which ones, somthing like chickens or budgies or something) and many of the different fancy types were actually developed by Darwin.


But he also traveled all over the world ( on the Beagle) especially the Galapagos Islands and Dawins finches there are the main example......


I know he looked at a wide range of things before coming up with his theory...but B could be the one, even tho D is possilbe.

survey