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Kisachek [45]
3 years ago
12

After Darwin proposed his ideas about natural selection as a mechanism for evolution was generally considered a theory. Why do w

e now refer to it as a theory?
Biology
1 answer:
djyliett [7]3 years ago
8 0
Because it's still not a fact. We don't know that that is what definitely happened so a theory is widely accepted but it's not absolute
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According to model 1, what are the reactants of cellular respiration?
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3 years ago
suppose you found a bone of a mastodon which had 6.25%c14and93.75%n14 how long ago did this animal die​
lisabon 2012 [21]

Answer:

t= 3886.18 years old

Explanation:

Whenever an animal dies de C14 and N14 begin to disintegrate in such a way that the proportion between C14 and C12 decreases, with a semi-disintegration period of 5.730 years, T. To get to know how long it takes an element to disintegrate, we must use this semi-disintegration period, which is the time it takes until the amount of the element is reduced to its half.  

We can find the age of the fossil, t, by using the next formula:

t = - (T x ln (C14))/ ln (2)

t = - (5730 x ln (0.625)/0.693

t= - (-2693.12)/0.693

t= 3886.18  

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3 years ago
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4 0
4 years ago
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Identify an invasive species in your local ecosystem. Discuss how the species adapted to its
Paraphin [41]

Answer:

Invasive species are among the leading threats to native wildlife. Approximately 42 percent of threatened or endangered species are at risk due to invasive species. These species were brout from other countries and they cause problems in these other countries or continents. Like the bees in america were not native and neither werer the cattle in the western hemisphere.

Explanation:

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