Do jaguars and black panthers compete for the same resources? is there competition between the species?

Yes jaguars And black panthers compete for the same resources because the are booth carnivores living in the same area trying to survive. So yes the two species are in competition.

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.