Ff- father
ff- mother
i am pretty sure just learned it like 3 yrs ago if not then its the opposite
        
             
        
        
        
Answer:
The egg contains both food and mitochondria in addition to its vital DNA, thats why it is much larger. The sperm cell has to be much smaller than the egg cell, because it is the one that swims. If a sperm cell were as big as an egg, it would not be able to move very fast nor very far.
 
        
             
        
        
        
Answer:
Difference Between Endangered Species and Threatened Species. ... what are the other causes apart from humans that can drive an entire species to ... When a species exist no longer, it is considered as extinct.