Q: Q: Hypoxia is a condition of the reduced supply of what? A:

OPTIONS:
- methane
- food
- nitrogen
- oxygen

A: oxygen

Q: Q: Metabolism produces waste energy in the form of heat, which helps what type of animal conserve and maintain heat at a relatively constant body temperature? A:

OPTIONS:
- lizard
- cold-blooded (ectotherm)
- amphibian
- warm-blooded (endotherm)

A: warm-blooded (endotherm)

Q: Q: How many types of simple machines are there? A:

OPTIONS:
- ten types
- three types
- two types
- six types

A: six types

Q: Q: B cells and t cells are examples of what type of cells? A:

OPTIONS:
- heart cells
- cancer cells
- skin cells
- white blood cells

A:
white blood cells