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Tutor profile: Zoe P.

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Zoe P.
5th year MSc (Hons) Biology student with tutoring experience
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Questions

Subject: Greek

TutorMe
Question:

Translate the following article about music from Greek into English: "Υπήρχε μια εποχή που το τραγούδι ήταν μέρος της καθημερινότητάς μας. Οι μετανάστες, πριν φύγουν για τη Γερμανία, βάζανε ελληνικούς δίσκους στη βαλίτσα. Οι μουσικόφιλοι μαλώνανε για το αν ο Θεοδωράκης ήταν καλύτερος συνθέτης από τον Χατζηδάκι. Οι νέοι μαζεύανε όλο τους το χαρτζιλίκι, για να φτιάξουν συλλογή δίσκων. Μαθαίνανε τα τραγούδια απ’ έξω. Καθώς πέρασαν τα χρόνια όμως, η μουσική και το τραγούδι χάσανε κάτι από την παλιά τους σημασία. Όταν μπήκε το διαδίκτυο στη ζωή μας, έφερε μαζί του ένα νέο τρόπο να απολαμβάνεις την αγαπημένη σου μουσική. Οποιοσδήποτε με ακουστικά στ’ αυτιά μπορούσε να ακούσει oτιδήποτε, όπου και όποτε ήθελε, χωρίς καν να χρειαστεί να ξοδέψει καθόλου χρήματα."

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Zoe P.
Answer:

There was a time when song was part of our daily life. Migrants before they left for Germany, would put Greek records in their suitcase. Music lovers would argue whether Theodorakis was better than Hatzidakis. Young people would save all their pocket money to build a record collection. They learnt the songs by heart. But as the years went by, music and song lost some of their earlier importance. When the Internet entered our lives, it brought with it a new way of enjoying your favourite music. Anybody with headphones could listen to anything, wherever and whenever they wanted, without even needing to spend any money.

Subject: R Programming

TutorMe
Question:

Explain how to make a bar chart using the ggplot2 package on R.

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Zoe P.
Answer:

First, you need to install the package using the following code: install.packages("ggplot2") Then you need to run the package: library(ggplot2) Then you need to import your data. If you have the following data frame: ## dose len ## 1 D0.5 4.2 ## 2 D1 10.0 ## 3 D2 29.5 Then in order to import it you do the following: df <- data.frame(dose=c("D0.5", "D1", "D2"), len=c(4.2, 10, 29.5)) In order to do a basic R plot you need to write the following code: p<-ggplot(data=df, aes(x=dose, y=len)) + geom_bar(stat="identity") p However, you can also do a horizontal bar-plot with the following code: p + coord_flip() In order to change the width and colour of the bars you can do the following: # Change the width of bars ggplot(data=df, aes(x=dose, y=len)) + geom_bar(stat="identity", width=0.5) # Change colors ggplot(data=df, aes(x=dose, y=len)) + geom_bar(stat="identity", color="blue", fill="white") # Minimal theme + blue fill color p<-ggplot(data=df, aes(x=dose, y=len)) + geom_bar(stat="identity", fill="steelblue")+ theme_minimal() p There are many more things that you can do to change the view of this graph which I would ask the student to play around with the code and try to understand it via hands-on experience.

Subject: Biology

TutorMe
Question:

Explain what we mean by the term "convergent evolution".

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Zoe P.
Answer:

Convergent evolution is the process where organisms that are not closely related, independently evolve similar characteristics in an effort to adapt to similar environmental stressors or ecological niches. In order for convergent evolution to take place, a random mutation on the molecular level needs to happen. This mutation is usually random and its purpose is not necessarily related to adaptive changes. An example of convergent evolution is the similarity of the wings of insects, birds, and bats. They are all very similar in structure and serve the same purpose but since those species are not closely related they have evolved independently. These structures that are the result of convergent evolution are called analogous structures.

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