Look it up in google it will help
(I’m not sure if the 1st question is correct)
What was a brief goal of their studies?
Darwin thought that evolution took place over hundreds or thousands of years and was impossible to witness in a human lifetime.
What did they observe?
Peter and Rosemary Grant observed evolution happen over the course of just two years.
What did they conclude?
That natural selection can be seen within a single lifetime, or even within a couple of years.
The transcontinental railroad allowed for the transportation of goods over long distances. This was especially helpful for the industrial north at the time.
Answer:
It is 250, the person above is incorrect. Please mark me brainliest.
Explanation:
p=2L+2W
L=50 W=75
p=2(50)+2(75)
p=100+150
p=250
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Hope this helps! Don't forget to mark Brainliest.</h2>
I believe the best answer is a.