B. By using up less calories than you take
        
             
        
        
        
Answer:
Carotenoids absorb light maximally between 460 nm and 550 nm and appear red, orange, or yellow to sight. 
 
        
                    
             
        
        
        
Answer:
More than 7000 chemicals are present in tobacco smoke. 
Explanation: 
In these 7000 chemicals, 250 are harmful to the human body such as carbonmonoxide, ammonia and hydrogen cyanide etc. There are some chemicals that are found in tobacco smoke which causes cancer disease in human. About 69 chemicals out of 250 are present in tobacco smoke that causes cancer disease. So its consumption is dangerous for health. 
 
        
                    
             
        
        
        
1.) B it is not d because it shows a growth in the beak size, it didn't say anything about the birds having larger beaks just that the size increased
2.) A
p=.5 q=.5
q^2=.25 p^2= .25 2(pq)= .5  everything added up is 1.0 so we good
so q^2, which is the recessive gene or gg, is 25 percent
        
             
        
        
        
Answer:
A human heart is roughly the size of a large fist.
Explanation:
but the size varies according to an individual's age, health and size. The heart weighs 7 to 15 ounces.