Which part of the atom carries a positive charge and determines the atomic number? Electron
Neutron
Nucleus
Proton

Types of scientific inquiry that biologist engage in that cannot be completely controlled

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.

How water is moving through the ecosystem ?