In your body, what two organs work together to make sure that oxygen gets to all the other organs of your body?
OPTIONS:
- Lungs and kidneys
- Heart and lungs
- Brain and kidneys
- Heart and liver

Heart and lungs


Which of the following represents the velocity of a moving object?
OPTIONS:
- 40
- 40 m north
- 40 m/s
- 40 m/s north

40 m/s north


Which cell structure carries out a function for a cell that is similar to the function that bark carries out for a tree?
OPTIONS:
- cell wall
- nucleus
- chloroplast
- mitochondrion


cell wall