Archean and Proterozonic which are both broken into early middle and late periods
        
                    
             
        
        
        
These two frog species separate by reduced hybrid viability. In reduced hybrid viability gene of different parent species may interact and impair the hybrid's development while in a reduced hybrid fertility a viable individual is sterile often due to the inability to produce normal gametes in meiosis. Hybrid breakdown; the first generation are viable and fertile, but when they mate the offspring are feeble and sterile.
        
             
        
        
        
Answer:
C. Taking blood samples from patients for research purposes
without consent
Explanation:
Generally, providers may not render medical services without the patient’s consent, unless performance of emergency, lifesaving care is necessary. Taking samples from a patient is a type of medical service; thus, state consent laws apply. In addition, providers may not disclose PHI without patient authorization.
It depends on the definition of unethical being used, however I think I am right. I'm in AP bio currently. Let me know what the answer is :) 
 
        
             
        
        
        
B- respiration or A- transport
        
             
        
        
        
Answer:
i think the answer is 0.00042. i hope this is right 
Explanation: