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guajiro [1.7K]
3 years ago
11

Dengue fever, a zoonotic disease, is endemic in northern mexico, but not in the u.s. provide two possible explanations for this

dichotomy and explain your answer.
Biology
1 answer:
Inessa [10]3 years ago
6 0

One explanation could be the differences in climate (environmental factors). The climate in northern Mexico could support the reproduction of the mosquito species, which is a vector of the dengue virus.   Other environmental conditions that influence its endemicity could include living conditions and sanitation. The other possiblity could be that the people in the US have developed immunity for the disease, therefore, are unaffected even when infected by the virus.






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I am Lyosha [343]

Correct answer: Halftone

The halftone is a reprographic technique, which uses continuous imaginary tone by the use of dots, which vary in size or in spacing.

Example: The shades of gray in print are produced by breaking the image of the object into tiny dots that appear to blend into a continuous tone when viewed with a naked eye. Such a pattern of tiny dots is called a halftone.



4 0
3 years ago
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The modern synthesis brought together Darwin's theory of evolution with Mendelian genetics. Why was this so important?
MakcuM [25]

Answer:

Option C

Explanation:

Options for the question are

a.  It demonstrated that nothing in biology makes sense except in the light of evolution.

b.  It demonstrated that species arise from other species.

c.  It provided a quantifiable mechanism to explain gradual evolutionary change.

d.  It was the first time that change in biological organisms was observed.

e.  It was not very important to evolutionary biology.

Solution -

The term modern synthesis by coined by Julian Huxley and the goal of this synthesis was to understand and determine how genetics bring evolutionary changes in a population and with this objective it combined the Darwin’s theory of evolution and Mendel’s work on heredity. Later on scientist Dobzhansky under this synthesis found that genetic mutation causes variation through the process of natural selection and hence lead to evolutionary changes in a population even if they are isolated for a long time.  

Hence, option C is correct

3 0
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Soloha48 [4]
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jeyben [28]

Answer:

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