Answer:
The third one, The opening of the cup is so much bigger than the bottom even though the cup moves they will both be stacked together. (I think)
Explanation:
 
        
             
        
        
        
Answer: The study of plant varieties.
Explanation:
This question relates to the studies that Gregor Mendel, founder of modern genetics, performed at the University of Vienna. 
Experimenting on pea plants, Gregor Mendel was able to establish a lot of the rules of heredity that we know today even though his research was not fully appreciated or understood during his own life. 
He credited the study of plant varieties to have been most crucial to his final analysis because farmers had been crossbreeding varieties for millennia to bring about better traits in plants. 
 
        
             
        
        
        
 Answer:
The plates can be thought of like pieces of a cracked shell that rest on the hot, molten rock of Earth's mantle and fit snugly against one another. The heat from radioactive processes within the planet's interior causes the plates to move, sometimes toward and sometimes away from each other
Explanation:
 
        
             
        
        
        
Answer:
A pollen grain from one flower fertilizes another flower, resulting in the development of a seed.
A frog releases sperm over eggs that were laid by another frog, and these cells fuse together.
Explanation:
Sexual reproduction is brought about by fusion of male and female gametes. Reproduction where a part of an existing organism develops into another organism is asexual. 
 
        
             
        
        
        
Answer:
Explanation:
there is a positive side and a negitive side to magnets two of the same side of the magnet will repel oppisites will attract
positive+positive=repel
positive+negitive=atract