TOEFL listening test 404

Here are the questions and answers (Scroll down to get to them) 18. What does the professor tell you about ferns? a) They can be divided easily. b) They are several hundreds thousands years old c) They are vascular plants d) They make wonderful house plants 19. What does the professor say about the frond? a) It is fragile b) It is the main part of the plant c) It conducts water d) It is made up of the stipe and the blade