Which staement describes an atomic nucleus A an atomic nucleus is negitivley charged
B an atomic necleus has no electrical charge
C an atomic nucleus consists of mostly empty space
D an atomic nucleus contains most of the atoms mass

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?

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?

What is an example of a scientific question that galileo could not have answered with out this new tool?