Exams and assignments tell us that...
Mammals are the only animals that lay eggs. the cuckoo bird is a mammalian bird who lays eggs. (opening lines in a grade-12 student's research essay.)
Insects take the anther of a flower with it's beak and put it in the anther of another flower.(grade-10 biology student)
Organisms that have both male and female parts are gay. (grade-10)
The flower has hooks in order to get carried away by insects.(grade-10)
20,000-2000=19666.66666 (grade 12 business studies)