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Marina86 [1]
3 years ago
6

4. Who discovered the first known case of a typhoid carrier?

Biology
2 answers:
Semmy [17]3 years ago
5 0

Answer:

mary mallon

Explanation:

Mary Mallon, the first known case of a healthy carrier in the United States, was proven responsible for the contamination of at least one hundred and twenty two people, including five dead

SashulF [63]3 years ago
4 0

Answer:

Mary Mallon (September 23, 1869 – November 11, 1938), also known as Typhoid Mary, was an Irish-born cook believed to have infected 53 people with typhoid fever, three of whom died, and the first person in the United States identified as an asymptomatic carrier of the disease pathogen, Salmonella typhi.

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Mademuasel [1]

When it is winter in the Northern Hemisphere, the Southern Hemisphere faces the Sun more directly and thus experiences warmer temperatures than the Northern Hemisphere. Meaning that the date is June 21- summer

6 0
3 years ago
¿Qué características crees que deben tener los métodos anticonceptivos para ser eficaces en el control de la natalidad?
Tanzania [10]

Answer:

Los métodos anticonceptivos para ser eficaces en el control de la natalidad deben ser seguros para las personas que los utilizan, es decir, no tener efectos adversos, o al menos, la menor cantidad posible. Ser reversibles, es decir, que no generen infertilidad de por vida. Deben ser además fáciles de usar, cómodos y fáciles de conseguir, esto es, económicos. Además deben ser eficientes en su objetivo de evitar la concepción, que es para lo que fueron creados.

Explanation:

La tasa de eficacia de un método anticonceptivo se mide por la cantidad de embarazos que se producen cada 100. Esta parece ser la característica más importante, y si bien es una de las más importantes, hay que tener en cuenta todos los otros factores mencionados, es decir que la gente pueda acceder a ellos, sean cómodos, seguros y a un precio coherente.

5 0
3 years ago
The mucous membrane that lines the eyelids and is reflected over the anterior surface of the eyeball is the conjunctiva is calle
lina2011 [118]

Answer:

its the conjunctivia......

Explanation:

8 0
3 years ago
Stars are made primarily of helium and hydrogen. True False
dolphi86 [110]

Answer:

This is false.

Explanation:

Stars are made of very hot gas. This gas is mostly hydrogen and helium, which are the two lightest elements. ... Most stars have small amounts of heavier elements like carbon, nitrogen, oxygen and iron, which were created by stars that existed before them.

4 0
4 years ago
Read 2 more answers
A mycorrhizal relationship in which the hypal filament does not penetrate the root cell, but grows around them is called?
sukhopar [10]

Answer:

Ectomycorrhiza

Explanation:

6 0
4 years ago
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