When the Europeans traveled to America, they brought with them diseases such as smallpox and malaria. Because the indigenous people had never been exposed to these diseases before, they had no immunity, and were therefore wiped out by the thousands. Over 90% of the Native American population was killed by foreign disease.
Answer:
The correct answer is: Stablishing the tests validity.
Explanation:
Establishing the tests validity is understood as the act of evaluating whether a particular test measures what it says it mesures.
It is the most important criteria in establishing the quality of a test.
A test that has not been proved to have validity is obsolete and its results are unnecesary.
In this particular case, Dr. Chu developed a spatial reasoning test. She is then comparing the scores on her test with the scores and grades of students enrolled in courses that involve spatial reasoning.
In this instance, Dr. Chu is in the process of Stablishing the tests validity.
Answer:
The oblique illumination is
used by the microscopists to resolve N. Spencrii in the Dark Field Condensers.
Explanation:
It was found that the use of oblique light was required to resolve the striae. Oblique illumination was the first step toward dark field microscopy. In dark field, light
seems to radiate from the specimen while all the rest of the field is black. Resolution is as good as that in bright field while contrast is enhanced.
In dark field microscopy, no
direct light from the condenser enters the objective lens. Only light
that is reflected, refracted or diffracted by the specimen enters the objective. The dark field condenser produces a circle of light. The
light is at an extremely oblique angle to the surface of the slide. This
oblique light comes to a focus on the specimen. It then diverges so
strongly that no direct light enters the objective. This type
of illumination is a hollow cone of light.
Saudi Arabia is named after the ruling family: the Saud family.
This family goes back to 18th century, and one of its members gained control of the Arabian Peninsula and founded a kingdom:
His name was Abdulaziz Ibn Saud. In the Arab world, he's known mostly as Abdulaziz and in the western World as "Ibn Saud".
Central Atlas Tamazight is one of the most-spoken Berber languages, along with Kabyle, Shilha, Riff, and Shawiya, and in Morocco it rivals Shilha as the most-spoken. All five languages may be referred to as 'Tamazight', but Central Atlas speakers are the only ones who use the term exclusively. As is typical of Afro-Asiatic languages, Tamazight has a series of "emphatic consonants" (realized as pharyngealized), uvulars, pharyngeals, and lacks the phoneme /p/. Tamazight has a phonemic three-vowel system, but also has numerous words without vowels.
