You're right. The Upper Mantle is directly under the Crust. Hope this helped! =^-^=
 
        
                    
             
        
        
        
<h2><u>Answer:</u></h2>
The recreation center is adjoining the Colorado River, 4 miles (6 km) north of Moab, Utah. In excess of 2,000 common sandstone curves are situated in the recreation center, including the notable Delicate Arch, just as an assortment of one of a kind land assets and developments. 
A characteristic curve, regular scaffold, or (less usually) shake curve is a characteristic shake development where a curve has framed with an opening underneath. Regular curves ordinarily shape where inland bluffs, waterfront precipices, blades or stacks are liable to disintegration from the ocean, streams or enduring (subaerial forms).
 
        
        
        
it is not because trees do not grow fast enough
 
        
             
        
        
        
Answer:
The correct answer would be - wildtype.
Explanation:
Let assume there are four genes which are :
A-B-C-D
In mutant first, the genotype would be:---a-b-C-D
In the mutant second, the genotype would be:--A-B-c-d
If both of these genotypes are crossed with each other, the recessive genes a, b of mutant first is dominated and masked the expression by the dominant genes present in the mutant second.
Similarly, the recessive genes of the mutant second are dominated and masked expression by the dominant genes of mutant first.  This is possible only due to different genes are present in mutants.
Thus, the correct answer is - The correct answer would be - wildtype.