| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.05 |
| Score | 0% | 61% |
__________ and __________ pair to strengthen bones.
vitamin D, calcium |
|
calcium, vitamin A |
|
iron, calcium |
|
vitamin D, magnesium |
Vitamin D helps calcium strengthen bones while also aiding muscle, nerve, and immune system function.
Which of the following is not true of light waves?
can travel through a vacuum |
|
travel faster than sound waves |
|
are mechanical waves |
|
are electromagnetic waves |
Unlike mechanical sound waves that require a physical medium for propagation, light waves are electromagnetic and can travel through empty space. Light waves are also much faster, travelling at 186,000 m/s vs. 343 m/s for sound waves.
The energy posessed by a thrown baseball is an example of what kind of energy?
transitional |
|
kinetic |
|
potential |
|
gravitational |
Kinetic energy is the energy posessed by a moving object. Potential energy is stored energy in a stationary object based on its location, position, shape, or state.
In cell biology, what part of the cell contains organelles?
nucleus |
|
cell wall |
|
cell membrane |
|
cytoplasm |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles.
Neurons are part of the __________ nervous system.
peripheral |
|
central |
|
autonomic |
|
somatic |
The nervous system consists of the brain and spinal cord (central nervous system) and the peripheral nervous system which is the network of nerve cells (neurons) that collect and distribute signals from the central nervous system throughout the body.