What role does serotonin play in the function of the brain? a) It is a chemical inhibiting violent tendencies.
b) Serotonin does not play a role in the function of the brain.
c) It helps us calm down when we are afraid.
d) It helps us handle pain

Grade 91.)the gravitational pull from the moon words).2.) what is the rate of gravitational 3.)if you drop a hammer, is it more likely to drop handle side down, head side down, or equal chance that it will land either way? why? 4.)a car moves 60km east and 90km west.a.) what is the distance the car traveled? b.) what is the car's displacement5.)what is the average velocity of a car that moved 60 km south in 3 hours? 6.) a car starts from rest and acceleration to 60 m/s over a time of 5 seconds. what is the acceleration of the car? 7.)what is the speed of an object at rest?

20 the main source of energy for our planet comes from the

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?