A differentiated part of an organism, such as an eye, wing, or leaf, that performs a specific
function

Which of the four major uses is predicted to change the least by 2020?

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?

The transport tubes for food coming down the plants are called?