Answer:
They help equally devide the cell.
Explanation:
Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis. During mitosis, the spindle fibers are called the mitotic spindle.
SOURCE: Nature.com
Consider Giving this Answer Brainliest.
 
        
                    
             
        
        
        
Sexual selection example; The brightness of the feathers of a peacock. You may also see similar traits in other birds, where some dance and show off bright feathers to attract a mate, where other build nests. These specific traits do not increase their chance of survival, and are not learned. They increase their fitness because they increase their chances of reproduction and passing on their genes. 
Survival of the fittest = Survival of those who survive, and reproduce
        
                    
             
        
        
        
The answer: Ventricles.
There are four ventricles in the brain all connected between them, 
where the cerebrospinal fluid is produced. There is a choroid plexus in each ventricle that produce the fluid.
The  four ventricles:
<span><span>-  2 lateral ventricles right and left (one for each hemisphere)</span>
-third ventricle<span>
- fourth ventricle</span></span>
 
        
        
        
Answer:
I saw that rock from the mantle is added to the edges of both plates at CONVERGENT plate boundaries, where the plates move AWAY FROM each other.
Explanation:
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Asexual reproduction limits the spread of harmful characteristics because the offspring is only inheriting from one parent.