Answer: Just putting this out there in the Animalia kingdom is comprised of multicellular eukaryotes. And in this kingdom there are roughly 7.7 million unique organisms. There still 5 other kingdoms in which organisms are classified whether that be multicellular, unicellular, eukaryotic are prokaryotic organisms. Basically what I am saying is I need much more information to answer this question.
It would be:
Individual < Population < Community < Ecosystem < Biome < Biosphere.
Answer: t= -1.60
Explanation:
Let 
be the population mean weight of pigs.
As per given , we have
Sample size : n= 16
Sample mean =
Sample standard deviation : 
<em>Since the population standard deviation is not known so the test is a</em><em> t-test.</em>
Test statistic for population mean : 
(Substitute all the values.)
Hence, the value of the test statistic needed to test the null hypothesis : t= -1.60
I could be wrong but I think it’s control group
They occur in terrestrial ecosystems.
