Biology Annual rainfall in grassland is about_____________? Options:A. More than 2500 mmB. 750-1500 mmC. 250-750 mmD. Less than 250 mmView AnswerC. 250-750 mm Continue Reading Previous: _________________ cells of phloem are directly involved in transport of organic solutes?Next: Exposure to low temperature stimulates plants to flower. This is called___________?