input with options: Q: Which leukocytes are first to respond to bacterial infections? A:
OPTIONS:
- chemocytes
- erythrocytes
- microcytes
- neutrophils
output: neutrophils

input with options: Q: Because all animals require an external source of what, they are called heterotrophic? A:
OPTIONS:
- fuel
- energy
- water
- food
output: food

input with options: Q: The rate at which the body uses food energy to sustain life and to do different activities is called the what? A:
OPTIONS:
- hormonal rate
- calorie rate
- life cycle
- metabolic rate
output: metabolic rate

input with options: Q: Alterations that change chromosome structure are known as? A:
OPTIONS:
- lesions
- traits
- deformities
- mutations
output:
mutations