During meiosis, independent assortment and crossing over of DNA segments result in gametes with diverse sets of genes. Additionally, random fertilization of an egg by a sperm occurs, forming a zygote with unique genetic material from each parent. 
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Answer:
they could use other forms of energy, such as solar or wind.
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Answer:
metal control uses neurons which are in form of electrical impulses while in hormonal control, hormones are used and they are in the form of proteins. Neural control has a wide range of effect in the body while as for hormonal control, it only affects a specific area depending on the hormone secreted
 
        
             
        
        
        
Answer:
droughts affect the water consumption needs of all types of organisms
 
        
             
        
        
        
B. some species die out when environmental changes occur