Please help me on this question!

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

Which of the following is not true about the atomic model of substances?

Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon