| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.92 |
| Score | 0% | 58% |
Poor balance could indicate an issue with which part of the nervous system?
cerebellum |
|
cerebrum |
|
medulla |
|
spinal cord |
The cerebellum is a large cluster of nerves at the base of the brain that's responsible for balance, movement, and muscle coordination.
Meteoroids, meteors and meteorites are categorized based on which of the following?
their density |
|
their temperature |
|
their size |
|
their location |
Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.
In cell biology, where does DNA replication take place?
mitochondria |
|
cytoplasm |
|
Golgi apparatus |
|
nucleus |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.
In the metric system, what prefix represents 103?
mega |
|
kilo |
|
centi |
|
milli |
Kilo is the metric system prefix for 103.
Which of the following is related to the Cambrian Explosion?
first civilizations |
|
fossil record |
|
extinction of dinosaurs |
|
carbon dating |
The Cambrian period is one of the most significant geological time periods. Lasting about 53 million years, it marked a dramatic burst of changes in life on Earth known as the Cambrian Explosion. It is from this period that the majority of the history of life on Earth, as documented by fossils, is found. Called the fossil record, the layering of these mineralized imprints of organisms preserved in sedementary rock have allowed geologists to build a historical record of plant and animal life on Earth.