The answer is C because if a doctor only tested new medication on one person then gave it to many other people with the same disease there might have been a mistake and could kill people
        
             
        
        
        
Fossils are the sediment layers trapped between plants and animals.They are <span>the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.</span>
        
             
        
        
        
The  statements describe how traits are inherited are:
- Traits are inherited when genes are passed from parents to offspring.
- An offspring can receive different alleles or the same alleles from each parent.
<h3>What are traits?</h3>
Dominant traits are always expressed when the connected allele is dominant, even if only one copy exists. 
Recessive traits are expressed only if both the connected alleles are recessive.
 Polygenetic traits are basically the traits that are controlled by two or more genes.
Thus, option "3 and 5" is correct.
To learn more about traits click here:
brainly.com/question/1463051
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Answer:
Even the keeping of animals as pets represents a type of mutualism. Pet dogs (Canis familiaris) and cats (Felis catus) are fed and kept safe in domestication, while humans benefit from the companionship of these animals, and sometimes from other services, as when cats kill pest rodents.
Explanation:
Hopefully this helps :)