Answer:
NASA is a U.S goverment acengy. It is responsible for sciecne and technology realted to air and space.  
Explanation:
NASA opened for on October ,19.58.  The agency was  created oversee U.S space exploritation and areonautics research. 
NASA stand for (National Aeronautics and Space Administration.)
 
        
             
        
        
        
Researchers selected candidate genes by identifying homozygous tracts shared by all three siblings along with the parental phenotype, this type of study is applied for the inheritance of recessive genes. Since the recessive genes can not be expressed in heterozygous genotype, the back tracking of carriers and homozygous recessive individual will help understand its inheritance pattern. The inheritance of dyt2 can be autosomal recessive. It is usually passed on to progeny of two carriers. 
 
        
             
        
        
        
Answer:
highlighted in bold above, are a struggle for existence, variation and inheritance
Explanation:
i hope this helps
 
        
             
        
        
        
Answer:
the correct answer is enzymes 
Explanation:
enzyme act as catalyst and is a biological molecule which within the cell membrane can speed up or increase the rate of biological reaction without affecting itself and is obtained unchanged at the end of reaction