Growth controlling factor at stem tip is? A. Any hormone B. Auxin C. Apical bud D. Light Right Answer: B. Auxin Share : December 24, 2017 Hassan Ali Biology Total 0 Votes: 0 0 Tell us how can we improve this Mcqs? Captcha: + = Verify Human or Spambot ? Related Mcqs Check Below -What is Prophage?Acoelomates belong to phylum?Biennial and perennial plants are stimulated to flower by exposure to low temperature. This is called?