Tiny openings in the epidermis of the leaf that allow air to enter the leaf are called

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?

How can you tell the difference between rough er from smooth er?

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above