Answer:
4 mass extinctions 
Explanation:
as there are huge drops in the graphs
at 440,390,260,50
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Because the plants are blooming to early and they can freeze
        
                    
             
        
        
        
Answer:50% chance, and the genotype would be heterozygous
Explanation:
G=gray r=black
       G     r
G   GG   Gr
r     Gr    rr
 
        
             
        
        
        
Chromosomes makes up genes while genes and chromosomes make up the entirety of DNA. A living organism inherits 46 chromosomes, 23 from each parent. These chromosomes are not genes but they form genes, which are just the traits of an individual that are unique. DNA is the entire make up of an organism that controls everything about a person such as likelihood to have disease or their physical appearance. 
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Answer:
Choose the correct label for each part of the experiment.
The plants that are under a UV light for eight hours
A. Experimental group 
The amount of water that is given to all of the plants
D.  controlled Variable 
The plants that are under the light for six hours  
B. Control Group 
Explanation: