Tutor profile: Patrice G.
Subject: Environmental Science
Question: In a rural town, there has been an e.coli outbreak. The grocery stores have been checked to see if they could be a potential source. None of the produce or beef is contaminated. Many residents expressed feeling symptoms after drinking water. What could the source of e.coli be?
Fecal matter containing e.coli from cattle farms can be deposited into water systems through agricultural runoff.
Subject: Earth Science
Question: During the month of December, it is winter in the Northern Hemisphere, but summer in the Southern Hemisphere. How would you explain this?
The reason behind the different seasons during the same month in different hemispheres is due to the tilt of the Earth towards the sun. In December, the Northern Hemisphere is tilted further away from the sun, while the Southern Hemisphere is tilted closer to the sun.
When comparing the forelimb bones of a bat and a whale, there are structural similarities, but the forelimbs are also clearly adapted for different functions. What is this an example of?
These are examples of homologous structures. The structure of the forelimbs in each animal are similar, but they've adapted for different usage. This is because both organisms share a common ancestor.
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