It is called peristalsis movement.
        
             
        
        
        
The individuals gametes cells would be damaged, possibly taking his ability to have offspring.
        
             
        
        
        
Answer:
<em>a. Cross-sectional study</em>
Explanation:
A cross-sectional analysis <em>includes at one particular point in time looking at data from a population.</em> Participants are chosen based on specific variables of interest in this type of study.
For developmental psychology, cross-sectional experiments are often used, but this approach is also used in many other fields, including social science and education.
 
        
             
        
        
        
Answer:
Competitive exclusion occurs when " organisms attempt to fill the same niche"
Explanation:
mostly due to the fact that they are competing over the same food source, which is always limited in some way.
 
        
             
        
        
        
B. larger and more complex
Explanation: As the environment became more unpredictable, bigger brains helped our ancestors survive.