Answer:
It marked the beginning of the Islamic era.
Explanation:
Hijrah or also known as Hejira is an important event in the Muslim religion. It marks the event of Prophet Muhammad's pilgrimage from the holy city of Mecca to Medina after he learned of some plots regarding his assassination. In order to save himself from being attacked, he secretly left Mecca and journeyed till Medina, which was at that time called Yathrib. This event of 622 CE signifies the start of the Muslim or Islamic era.
An example of a(n) double-blind research study would be where an experiment was conducted on caffeine-induced stress when neither the class researchers nor the test subjects knew who received caffeine and who did not until after the study was finished.
<h3>What is double-blind research study?</h3>
- A double-blind study is one in which neither the participants nor the researchers are aware of which group is getting the treatment.
- However, it also prohibits researchers from unintentionally disclosing information about the experiment.
- This type of study is particularly helpful in avoiding biased reports that are likely the result of placebo effects.
- Imagine, for instance, that researchers are looking into the effects of a novel medication.
- The participants in a double-blind study would not be aware of who was receiving the real medication and who was receiving a placebo, and neither would the researchers who contact with them.
Learn more about double-blind study here:
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Answer:
Mercantilism.
Explanation:
Mercantilism is a set of ideas, a system which was quite popular in Europe in the 17th and 18th century.
Some of its basic principles are:
- increasing export while decreasing import
- which should enable accumulation of capital in the form of gold and silver
- strong agriculture that would decrease the need for import
- using colonies for gaining cheap resources and for selling the final products.
Many of late-18th century philosophers and economists criticized mercantilism pointing out its flaws and limits, so today it is considered an outdated system.
Answer:
A plant has two organ systems: 1) the shoot system, and 2) the root system. The shoot system is above ground and includes the organs such as leaves, buds, stems, flowers (if the plant has any), and fruits (if the plant has any).
