what is the relationship between the size of the dna fragments and the distance fragments travel through the agarose gel?

How do chloroplasts set plants apart from other living things

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?

What do nitrifying bacteria convert