When a book sits on a shelf, what force (if any) does the shelf exert on the book? a. friction b. a normal force c. an action force d. the weight of the book

Chicken pox and hepatitis are bacterial diseases. true or false?

When elements that form a mineral dissolve in hot water, they form a mixture called a(n) a)geode b)vein c)evaporation d)crystallization e)magma f)lava g)solution h)gem

Jason, a dog breeder, decides to mate a poodle with a golden labrador retriever. he wants to get puppies with the curly hair of the poodle and the color of the labrador. what concept is shown in this example? question 6 options: artificial selection adaptation evolution natural selection