Answer - C. Bodies of water would freeze from the bottom up.
Reason - Since solid water aka ICE is denser than liquid.. Then we can kiss our penguins good buy cause the whole Earth will be submerge of water since the Arctic is made of ice and if it sank boom there goes for the planet and so as Antarctica.
        
                    
             
        
        
        
Answer:
Microtubules, like actin filaments, are dynamic structures: they can grow and shrink quickly by the addition or removal of tubulin proteins. Also similar to actin filaments, microtubules have directionality, meaning that they have two ends that are structurally different from one another. I hope this helps :)
 
        
             
        
        
        
Answer:
<u><em>The correct option is C) Prions</em></u>
Explanation:
Bovine spongiform encephalopathy (BSE)  or Mad Cow Disease  is a disease which occurs due to transmissible particles known as prions. Prions cannot be considered as living organisms as they do not acquire many of the living characteristics. They are just considered as a protein which gest converted into an activated, toxic form  as soon as they encounter a host cell. This toxic protein harms the central nervous system (CNS) of the cow host and is transmissible. 
 
        
             
        
        
        
Four egg cells are produced in meiosis but only one will actually be used.