(Question)
You are presented with the question "What causes a planet to accelerate?" and the following answer choices: - other planets - magnets - wind - gravitational pull - flow of electrons - It gets heated up - heat energy - energy of moving objects Now knowing that the mass of a planet causes the pull of gravity on that planet and gravity accelerates mass, choose the best answer.
(Answer)
gravitational pull

(Question)
You are presented with the question "sex hormones are what in male and female bodies?" and the following answer choices: - Something that is self-aware - more abundant - allow growth - production - consumers - lymph nodes - competing for resources - chemical messengers Now knowing that sex hormones are chemical messengers that control sexual development and reproduction and sex hormones control sexual development in male and female bodies, choose the best answer.
(Answer)
chemical messengers

(Question)
You are presented with the question "excitotoxicity can do what to the structural units of the nervous system?" and the following answer choices: - harm - loss - duplicate - kill - mutate - death - function - damage Now knowing that neurons are the structural and functional units of the nervous system and excitotoxicity kills some neurons, choose the best answer.
(Answer)
kill