Answer:
The effective ingredient was likely quinine from the cinchona tree.
Explanation:
Quinine is obtained from the bark of the cinchona tree and it is used in the treatment of malaria. Malaria is transmitted to humans by several species of mosquitoes. In South America, Malaria is mostly transmitted in rain forest areas in northern countries. Therefore, in the situation we are studying here, the member who became ill might have been infected. The quinine present in the cinchona bark made him feel better.
The aim of the remainder of the Crusades in the 13th century was to combat anyone considered an enemy of the Christians.
The goal of Albigensian Crusade(1208-1229), was to eliminate the Cathars sect in southern France. Another Crusade, The Baltic(1211-1225), had the same objective but with the pagans in Transylvania.
In 1216 the Crusades attacked Egypt but were defeated by the Muslims in 1221. The Muslims were commanded by Al-Malik al Kamil.
Answer:
E)
Explanation:
A, B, C, are considering factors that are influencing the climate of an area but they must be in interaction in between them.
D) is not the factor for that and that is why it is an incorrect answer.
The thing that determines the weather of a place over a period of time if influences by interacting factors such as nearby water, ocean, topography, vegetation, and more.
In a procedure called random assignment, participants are placed in experimental conditions on the basis of chance, thus minimizing biases or preexisting differences in the groups.
Basically, the experimental condition is once the man of science manipulates the variable to assess its result on the variable. Below the experimental conditions, the participants receive experimental treatment whereas the participants within the control group don't receive any treatment.
Random assignment helps make sure that members of every group within the experiment area unit identical, which implies that the teams are doubtless a lot of representative of what's present within the larger population.
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