Which of the following is true about a phylogenetic tree ? A) they're a way of visualizing how different species are related. B) Branch length always corresponds to how long a species has been alive. C) The species to the right are more evolved than the species to the left. D) All of the above.

Ricardo notices that when he plays soccer in the rain, his ball does not seem to go as far after a kick. what is the best scientific question that ricardo could ask about this observation? is soccer better played in the rain or sun? how does rain affect the distance a soccer ball can travel? how does rain affect the speed of a soccer ball? is soccer affected by the rain?

What amino acid is coded for by this sequence after the mutation

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?