<span>The formation of the fertilization envelope (slow-block to polyspermy) requires an increase in the availability of </span>calcium ions.
Slow-block to polyspermy is also called cortical reaction. In this reaction, the sperm will be permanently blocked by cortical granules. The release of calcium ion will trigger this reaction.
        
             
        
        
        
Invasive species is the easiest way to answer this, with invasive species the diversity will likely decrease
        
             
        
        
        
The difference between a dominant trait and a recessive trait is that the dominant trait must have one copy of each from two different parent 
Example: Brown Hair=H
Light hair=h
Hh is dominant because this is of a copy of each from two parents
A recessive trait must have two same copies coming from the same two parents
Example: HH
        
             
        
        
        
Answer:
The correct answer is option C "The pressure change causes the organ of Corti to vibrate vertically".
Explanation:
The organ of Corti is an important structure for auditory perception that acts as a receptor organ for hearing.  The organ of Corti is located in the mammalian cochlea and it allows for the transduction of auditory signals into nerve impulses according to the vibrations that are received from external sources. If the receiving sounds comes from the stapes pushing against membrane covering the oval window, the pressure change will causes the organ of Corti to vibrate vertically. Stimulus from membrane covering the oval window are sent to the organ of Corti, which responds by vibrating vertically.