Answer:
All the F2 progeny with recessive traits would be males
Explanation: This is because the x-linked trait chromosomes are recessive, The F1 when crossed would contain females but when crossed again the F2  progeny with recessive traits would be males 
 
        
             
        
        
        
Answer:
No hablo español, así que pido disculpas por cualquier error.
  La teoría de la panspermia, que sugiere que la vida en la Tierra no se originó en nuestro planeta, sino que fue transportada aquí desde otro lugar del universo.
 
        
                    
             
        
        
        
Answer:
may be 
the discovery of new evidence 
Explanation:
Accepted theories may be modified or overturned as new evidence and perspective emerges. Scientists are likely to accept a new or modified theory if it explains everything the old theory did and more. The process of theory change may take time and involve controversy, but eventually the scientific explanation that is more accurate will be accepted.