Answer: Primates.
- A Primates
- B a plain reptile group
- C only the amphibians
- D some egg-laying birds
Correct answer: A. Primates
Explanation: Primates such as monkeys, apes and humans show the menstrual cycle.
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.