Home » Biology » Secondary thickening is initiated in a dicotyledonous stem by theSecondary thickening is initiated in a dicotyledonous stem by the Secondary thickening is initiated in a dicotyledonous stem by the A. xylem parenchyma B. secondary phloem C. endodermis D. cambium Correct Answer: Option D Explanation Related Posts The direction wind is determined by Which of the following organs regulates the levels of water. salts, hydrogen ions, and urea… The set- up above is used to demonstrate Which of the following is not a characteristics feature of a wind dispersed fruit? Fertilization in humans usually takes place in the For pollination and fruit formation, the essential part(s) of the flower should be the