Heart muscle cells - heart muscle tisse, heart, cardiovascular system
14. Multiple Choice
1 minute
1 pt
Which characteristic do single-celled organisms and multicellular organisms have in common?
Both have cells with specialized functions for each life process.
Both perform all life processes within one cell.
Both have a way to get rid of waste materials.
Both are able to make food from sunlight.
15. Multiple Choice
1 minute
1 pt
Which body system sends electrical signals to all other body systems?
circulatory system
nervous system
digestive system
skeletal system
16. Multiple Choice
1 minute
1 pt
A scientist is trying to decide whether an organism is unicellular or multicellular. Which information would help the scientist most to make her decision?
size of the cells of the organism
what the organism eats
how many types of cells are in the organism
how fast the organism grows
17. Multiple Choice
1 minute
1 pt
Which two human body systems are most responsible for getting oxygen to cells?
digestive and skeletal
skeletal and circulatory
circulatory and respiratory
respiratory and digestive
18. Multiple Choice
1 minute
1 pt
Which best compares the respiratory system to the circulatory system?
The respiratory system transports oxygen to cells, while the circulatory system provides oxygen for cells.
The respiratory system provides oxygen for cells, while the circulatory system transports oxygen to cells.
The respiratory system breaks down food for cell energy, while the circulatory system rids the body of waste.
The respiratory system rids the body of waste, while the circulatory system breaks down food for cell energy.
19. Multiple Choice
1 minute
1 pt
Which best explains why both cats and humans are multicellular organisms?
They get energy from many food sources.
They get energy from a single food source
They need only one cell to meet their basic needs.
They need many cells working together to meet their basic needs.
20. Multiple Choice
1 minute
1 pt
Which body systems work together to allow the body to move?