Lesions to the medial geniculate of the amygdala block conventional auditory fear conditioning.
Medial geniculate
The medial geniculate body (MGB) is a collection of nuclei that receives heavy input from the IC and acts as a key synaptic junction on the routes that carry data to the cerebral cortex's auditory regions.
 One should also think about how the medial geniculate's structure might affect its possible roles as a relay nucleus given the substantial studies on its anatomy. It is not in question that the MGv, which is the lemniscal portion of the MGB, "relays" accurate auditory information to the primary auditory cortex.
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Answer:
A forest ecosystem can support a limited number of bears because bears are the supreme predators of their ecosystem and very few animals can hunt bears so nature by supporting a limited number of bear populations supports a balanced number of population of its prey like insects, fishes, deer.
Another reason for the limited population of bear is that bear occupies the highest trophic level in the ecosystem so according to 10% law of energy transfer, it will get very less energy from its food so it needs to eat more.  
Therefore the population of bears is limited because the environment can not meet the energy requirement of many bears so a forest ecosystem can support a limited number of bears.
 
        
                    
             
        
        
        
Answer:
Taking more samples from different parts of an acre. 
Explanation:
Validity and accuracy of the data is crucial for any serious research. In this particular case, the most accurate data would be obtained if earthworms would be counted on the whole acre. Of course, this would consume lot of time, people, money etc. That's why methods for estimation are used. Estimation best works with large number of samples. Since one acre equals over 4000 square meters, taking only five samples from such a big area is simply not enough for obtaining valid data.
One of the possible ways to improve estimation is to take more samples per acre while avoiding taking adjacent samples because it could be possible that number of earthworms in one part of an acre is increased (or decreased) for any reason, which would lead us to wrong conclusion.
 
        
             
        
        
        
Answer:
The most important reason for learning about environmental systems is due to the fact that we should know what's going on in the world around us. If we were to travel to Asia, we should know the forests that lie there to pack appropriately. It's also important to just be aware of how the world works. It's also good to know what rock type you'll be walking on, so you can pack shoes accordingly. Overall, it's better to know the world around you than to live in ignorance.
 
        
             
        
        
        
It keeps the water in the plant, so it keeps the water from evaporating and killing the plant