Answer: Sexual maturity.
- A Sexual maturity
- B a plain birth event
- C only the death point
- D some early cell split
Correct answer: A. Sexual maturity
Explanation: The juvenile phase ends when the organism attains sexual maturity.
Structure of a mature flower. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.
Concept context
Asexual and sexual reproduction, flower anatomy, pollination, fertilization, and seed development.