Some examples of limiting factors are biotic, like food, and mates. Limiting factors can affect the populations of both plant and animal species. An invasive species is an organism that is not indigenous, or native, to a particular area.
        
                    
             
        
        
        
Answer: For decreased chances of rejection 
Explanation: 
The three higly polymorphic MHC 1 genes in human beings are HLA-A, HLA-B and HLA-C.
These determine the compatibility of the organ or tissue in the recipient's body each by the help of many alleles that segregates in a population.
There are very less chances that a random chosen donor will match the a recipient six allele genotype.
This is the reason parent  may be the best donor for organ transplantation or tissue transplantation.
 
        
             
        
        
        
Points c and d would have spring tides.
        
                    
             
        
        
        
Answer:
The skull is from a fossil skull of Styracosaurus - a horned dinosaur.
Explanation:
This skull image is the skull of a Styracosaurus dinosaur who was a huge dinosaur almost 5 meters or more with the horned present on the skull. This is a fossil skull representation from the fossils.
Styracosaurus was present 75 million years ago during the Cretaceous period who was a completely herbivorous ceratopsian dinosaur. 
Thus, the skull is from a fossil skull of Styracosaurus - a horned dinosaur.
 
        
             
        
        
        
A is the answer because it multiplies itself by 3 each time