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Julien L.
Academic marine biologist - 12 years experience
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R Programming
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Question:

Enumerate all functions used in this piece of code. require(rgl) diameter <- 10 points <- 1000 phi <- runif(points,0,2*pi) costheta <-runif(points,-1,1) u <- runif(points,0.9,1) theta <- acos(costheta) r <- diameter*u^1/3 x <- r*sin(theta)*cos(phi) y <- r*sin(theta)*sin(phi) z <- r*cos(theta) plot3d(x,y,z, col='blue')

Julien L.
Answer:

The functions used in this code are: require, runif, acos, cos, sin, ^1/3, * and plot3d

Environmental Science
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Question:

What are the main threats to biodiversity?

Julien L.
Answer:

The main threats to biodiversity are habitat fragmentation and degradation, over-exploitation of natural ressources, and invasive alien species.

Biology
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Question:

What does the acronym DNA stand for and what is the function of this molecule?

Julien L.
Answer:

DNA stands for DesoxyRibonucleic Acid and that is the molecule that carries the informations required for the functionning of all living organisms. DNA is to living organisms what source codes are to softwares.

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