I think elevation impacts the temperature at which water boils because...
As the altitude increases the pressure in the atmosphere decreases. This means that when the atmospheric pressure is lower, your water will reach it's boiling point faster. (AKA: at a lower temperature.) 
 
        
             
        
        
        
Answer: Node
Explanation:
Cladograms are a graphical representation of the evolutionary relationship between organisms. These are usually shown as branches from a central point, which represents a common ancestor. In rooted cladograms, the branches are shown relative to the time elapsed since evolving from a common ancestor joined at the node, or point of divergence.
Evolution typically occurs after accumulating mutation, and natural selection of beneficial traits that confer greater chances for survival.
 
        
             
        
        
        
✧・゚: *✧・゚:*    *:・゚✧*:・゚✧
                   Hello!
✧・゚: *✧・゚:*    *:・゚✧*:・゚✧
❖ Gregor Mendel wasn't able to prove his rules of inheritance using hawkweed (plant of the daisy family).
~ ʜᴏᴘᴇ ᴛʜɪꜱ ʜᴇʟᴘꜱ! :) ♡
~ ᴄʟᴏᴜᴛᴀɴꜱᴡᴇʀꜱ 
 
        
             
        
        
        
The answers would be:
Genotype                Phenotype
      Tt                      Tall stemmed
      tt                       Short stemmed
Genotypic ratio : 2:2 or 1:1
Phenotypic ratio: 2:2  or 1:1  
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<u>You can read on to see how this was done:</u>
Tall stems (T) are dominant to short stems (t).
First figure out the genotypes of the parents. We have a short-stemmed plant and a heterozygous long-stemmed plant cross. 
For short stem to occur, you need 2 pairs of short alleles. So the first parent would have a genotype of tt.
Heterozygous long-stemmed means that the parent has one of each allele. So the genotype of the second parent would be, Tt. 
Now we can make our Punnett Square.
tt x Tt
<u>       t        t  </u>
<u>T |  Tt  |   Tt</u>
<u>t  |   tt  |   tt</u>
Let's list down the genotypes and phenotypic results.
Genotype        no.         Phenotype
      Tt                 2           Tall stemmed
      tt                  2           Short stemmed
So from that we can answer the other questions:
Genotypic ratio : 2:2 or 1:1
Phenotypic ratio: 2:2  or 1:1