(10 points) a chemical

a. is when something changes the state of matter
b. creates one or more new substances
c. is only a physical change
d. happens in the water cycle

Which are forms of nitrogen that are usable by humans

Eutrophication caused by human nutrient pollution.

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