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.
Answer:
B
Explanation:
its literally a cell law .-.
Answer: To be produced by meiosis
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Answer:
i don't really know what you're asking. But, if you're asking what the main energy source is then it would be the sun.
Explanation:
