Q: What begins when a neuron receives a chemical stimulus? Choices: - a induce impulse - a metabolism impulse - nerve reaction - a nerve impulse A:
a nerve impulse

Q: What type of contamination causes almost 90% of diarrheal disease worldwide? Choices: - air contamination - ground contamination - food contamination - water supply contamination A:
water supply contamination

Q: Q: What class of animals, translated as "head foot", includes octopuses, squids, cuttlefish, and nautilus? Choices: - mollusks - crustaceans - bivalves - cephalopods A:
A: cephalopods

Question: Q: What are terrestrial biomes determined by? Choices: - moisture and elevation - pressure and temperature - time and temperature - temperature and moisture A:
Answer: temperature and moisture

*Question*
Q: What term means anything that is detected either through human senses or with instruments and measuring devices that extend human senses? Choices: - variation - evaluation - evacuation - observation A:
**Answer**
observation

(Question)
Q: What helps control the muscles and maintain balance? Choices: - circulatory system - muscular system - lymphatic system - nervous system A:
(Answer)
nervous system