HEL Whenever Paramecium aurelia and Paramecium caudatum
are placed into the same culture and given a constant
supply of food under constant conditions, P. aurelia will
always outcompete P. caudatum, which eventually dies
off. What factors prevents P. caudatum from surviving in
this situation?

Cattle with brown fur and cattle with white fur will produce a reddish roan calf . when examined closely, the calf show about an even number of brown hairs and white hairs that give a reddish appearance when viewed from far away. the fact that both the brown fur allele and the white fur allele are expressed equally in the offspring is an example of