id	keyword
biotropia-507	cells
biotropia-507	mitotic
biotropia-507	heyneanus
biotropia-507	root
biotropia-507	allium
biotropia-507	cepa
biotropia-507	fig
biotropia-507	chromosomes
biotropia-507	metaphase
biotropia-507	extracts
biotropia-507	aberrations