When it is said that mutation is the ultimate source of genetic variation it means that it creates several new combinations which is similar to  meiosis and fertilization because <span> new alleles and genes appear. It is just about some common points.</span>
        
             
        
        
        
Answer:
Vertebrates contain nervous system which is highly specialized organ.
Explanation:
The nervous system is the complex system in the vertebrate body which is composed of central nervous system that contain brain,spinal cord and peripheral nervous system which contain cranial nerve, spinal nerve,involuntary nerve etc.
The nervous system contain neurons that mainly transmit signal to the different parts of the body.
The peripheral nervous sytem contain somatic and visceral part.
The grey matter and white matter are the 2 areas in vertebrate nervous system.
 
        
             
        
        
        
The answer is false,it comes from genes that you get from both your parents
        
             
        
        
        
The answer would be: cell lysis due to the effect of osmotic pressure<span>
Cell membrane is important for microorganism because of it separate things outside cells and inside cells. This way, the cell can keep electrolyte and other useful things like carbohydrate and proteins. The cells also dump toxins and dangerous chemical that it produce outside the membrane so it won't damage organs inside the cells. 
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They are composed of proteins. I cannot see the options but hopefully that answer is in one of them