The correct answer is: A. minus end; dynein
Microtubules are cytoskeletal fibers that have an important role in the intracellular transport (movement of vesicles within the cell) and in the mitotic spindle during mitosis. The plus end of the microtubules extend through the periphery of the cells while the minus ends are anchored within the centrosome.
Necessary proteins for the vesicle’s movement are motor proteins:
•	kinesin  which is positive end directed
•  dynein which is negative end directed
So, beside vesicles these proteins are also involved in organelles’ transport in opposite directions through the cytoplasm.
 
        
             
        
        
        
The heart
hope it's fine :P
        
                    
             
        
        
        
Answer:
Cutworms, aphids, crickets, slugs, flea beetles, whiteflies, leafminers, and lepidopterous larvae  can be troublesome in the plant bed.
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Hope this helps
 
        
             
        
        
        
Answer:
maybe abiotic and biotic..? 
I'm not 100% sure what you're looking for, sorry!
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Answer:
If you place an animal or a plant cell in a hypertonic solution, the cell shrinks, because it loses water ( water moves from a higher concentration inside the cell to a lower concentration outside ). A single animal cell ( like a red blood cell) placed in a hypotonic solution will fill up with water and then burst.