Give the number of protons, neutrons and electrons in the lithium atom shown in the diagram above,
Number of protons
Number of neutrons
Number of electrons

In the family tree below, people with the recessive trait of attached earlobes are shaded gray.

Crossing over is a method of (blank)?

Easy 6th grade work! 100 points! i need fast! compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city, describe the parts of a cell and their primary function.