The fossil range can simply be defined as the time period in which an organism has existed, thus left fossil traces of its existence. The fossil range can be very short, medium, or long, thus usually there are limitations before certain type of organism evolves into another species, thus eliminating the ancestral organism from the fossil records. On the other hand, there are organisms that have incredibly big fossil ranges of several hundred million years, and since they emerged, they have remained almost unchanged. Those kind of fossil ranges are very rare though, and they don't represent the general picture. Most of the fossil ranges are between several thousand years and several million years, as that is usually how much a species exists, ending its reign, be it because of competition, changes in the environment, or big natural disaster.
Answer:
It has been proven time and time again that pineapples live under the sea
Answer: In Medieval Europe, knights pledged loyalty to vassals, who in turn pledged theirs to powerful lords, and serfs labored in the fields.
Explanation:
A rigid hierarchy refers to one where people who are born into a certain position in life, find it quite hard to move from it or rather one where there are different social classes and people had to be classified in one class for the system to work.
The system during medieval times was much like this. Social classes existed that determined a person's worth in society such as the knights, vassals, Lords and Royals. There was also the serfs who were considered the lowest in the hierarchy.
It will be Summer time in January for Argentina
Answer:
Kilauea
Explanation:
Kilauea is a typical shield volcano and Mt. St. Helens is a great example of a stratovolcano. Although both are currently active, the types of eruptions that we could expect from each mountain are quite different. Kilauea, while more active, features slow moving basaltic flows that even a person on foot could escape. The eruptions tend to be gentle and do not usually cause a great deal of damage. Mt. St. Helens, on the other hand, is much more dangerous because of it's violent eruptions accompanied by large amounts of ash, violent lava and mudflows and flying debris. As a stratovolcano it is less active but for more powerful and unpredictable.
