It is a wrong quote. Science is supposed to keep changing as we find new information and discover that our previous theories were wrong.
        
             
        
        
        
Chemoreceptors is the answer
        
             
        
        
        
Answer:
One example of a recessive inherited trait is a smooth chin, as opposed to a dominant cleft chin. Let (S) represent the dominant allele, and (s) represent the recessive allele. Only (ss) individuals will express a smooth chin. To determine the probability of inheritance of a smooth chin (or any other recessive trait), the genotypes of the parents must be considered. If one parent is heterozygous (Ss) and the other is homozygous recessive (ss), then half of their offspring will have a smooth chin.
Explanation:
 
        
             
        
        
        
Answer:
D. Risk
Explanation:
RISK can be seen as a tendency or likelihood that a person or an individual may encounter, faced or be exposed to something that may be harmful or have an adverse health effect on such person Example a house that has a foundation that is not strong is an hazard reason been that their is likelihood or tendency that a person or an individual might be harmed if the house collapsed because the foundation of the building is not strong for the building to stand long on it without collapsing.
 
        
             
        
        
        
Explanation:
Avg speed × total times = total distance 
20×25=500
Since acceleration in the 1st interval is same as deceleration in the 3rd interval and deceleration is from the same velocity achieved after acceleration, t 
1
 
 =t 
3
 
 
s 
1
 
 = 
2
1
 
 ×5t 
1
2
 
 
s 
2
 
 =(5t 
1
 
 )t 
2
 
 
s 
3
 
 =(5t 
1
 
 )×t 
3
 
 − 
2
1
 
 ×5×t 
1
2
 
 =(5t 
1
 
 )×t 
1
 
 − 
2
1
 
 ×5×t 
1
2
 
 
s 
1
 
 +s 
2
 
 +s 
3
 
 =5t 
1
 
 t 
2
 
 +5t 
1
2
 
 
⇒5t 
1
2
 
 +5t 
1
 
 t 
2
 
 =500−−−−1
2t 
1
 
 +t 
2
 
 =25−−−−2
Solving (1 ) and (2) ⇒t 
1
 
 =5,t 
2
 
 =15sec