In geology, <u>index fossils</u> are very important in allowing scientists to study the climate, environment, and diets of those fossils, and fossils from similar time periods.
Answer: They both give clues about life in the past.
Answer:
That depends where you’re going by train and where you’re taking the train from. It’s sort of like taking a plane to wherever you want to go. The farther you are from your destination, the more expensive it is.
The ability to generalize a study's results to different circumstances is known as external validity that suffers from 7 types of threats.
<h3>What are the threats to External Validity?</h3>
There are 7 major threats to external validity.
- The first threat is sampling bias, in which a sample is not representative of the population.
- The second threat is history, where an unrelated incident can affect the results.
- The third threat is observer bias, in which the traits or actions of the experimenter unintentionally affect the results, resulting in bias and other demand features.
- The fourth threat is the Hawthorne effect, which describes the propensity for individuals to alter their behaviour merely because they are aware that they are being observed.
- The fifth threat is the Testing Effect, in which the results are impacted by whether a test is administered before or after another.
- The sixth threat is the aptitude-treatment, which involves the interaction of individual and group factors to affect the dependent variable.
- The environment, time of day, location, researcher traits, and other variables that restrict the generalizability of the results are included in the seventh threat.
To learn more about external validity, refer:
brainly.com/question/28760166
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The rule used to translate the image is 
.
In this question we are going to speak of point translations. Vectorially speaking, a translation between two points is defined by this expression:
(1)
Where:
- Original point.
- Translation vector.
- Translated point.
If we know that 
and 
, then the translation vector is:
Therefore, the rule used to translate the image is .
We kindly invite to see this question on translations: brainly.com/question/17485121
