Ques: Q: Living things that feed on others are generally known as what? Choices: - customers - isolators - producers - consumers A:
Ans: consumers

Ques: Q: What gases move in and out of blood during gas exchange? Choices: - oxygen, carbon monoxide - nitrogen, carbon dioxide - oxygen, nitrogen - oxygen, carbon dioxide A:
Ans: oxygen, carbon dioxide

Ques: Q: Stimuli in the brain, stomach, and small intestine activate or inhibit production of what secretion? Choices: - metabolic juice - sweat - digestive juice - gastric juice A:
Ans: gastric juice

Ques: Q: What are biological catalysts that speeds up biochemical reactions? Choices: - carbohydrates - hormones - proteins - enzymes A:
Ans:
enzymes