Answer: External.
- A External
- B a plain internal type
- C only self fertilisation
- D some double fertilisation
Correct answer: A. External
Explanation: When gametes fuse outside the body it is external fertilisation.
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.