Which of the following questions would not be an appropriate scientific question that could be tested through experimentation? A)What is the most popular color? B) What impact does pollution have on the colors seen in the rainbow? C) What affect does color have on moods? D) Which brand of crayons has the brightest colors?

Amutagen is 1: a living thing that has undergone a mutation. 2: an agent that causes a mutation in dna. 3: a mutation that has affected one gene. 4: a chemical that can poison living cells.

My question says on my assignment. read the following scenarios and decide which of the properties of life are being described. the first one is. katherine stopped on the way to school to grab some donuts. 2. because a dog cannot sweat, it has to pant in order to stay cool. 3. an elephant trun had no bone but 4,000 muscles. i have no idea what i am supposed to anwer. i can't find the answer in my notes or book that i can understand anyway

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain