List of top Biology Questions on Menstrual Cycle asked in CBSE Class Twelve Board Exam

Assertion (A): Corpus luteum secretes the hormone, progesterone. Reason (R): Hormone Progesterone is essential for maintenance of the endometrium.

(b) For successful pregnancy, at what phase of the menstrual cycle an early embryo (up to 3 blastomeres) should be implanted in the uterus (IUT) of a human female who has opted for Assisted Reproductive Technology (ART)? Support your answer with a reason.

In a human female, the reproductive phase starts on the onset of puberty and ceases around middle age of the female. Study the graph given below regarding menstrual cycle and answer the questions that follow:

(a) Name the hormones and their source organ, which are responsible for menstrual cycle at puberty.

Explain the following phases in the menstrual cycle of a human female:
(1) Menstruation
(2) Follicular phase
(3) Luteal phase

‘A proper understanding of the menstrual cycle can help immensely in family planning.’ Do you agree with the statement? Provide reasons for your answer.

The world is facing accelerated rates of species extinction largely due to human activities. Explain any three human activities responsible for accelerated rates of species extinction.

In a human female, the reproductive phase starts on the onset of puberty and ceases around middle age of the female. Study the graph given below regarding menstrual cycle and answer the questions that follow: \begin{figure}[h!] \centering \includegraphics[width=0.8\textwidth]{Screenshot 2025-01-17 101211.png} % Replace 'path_to_your_image.png' with the actual path to your graph image \caption{Graph showing the hormonal regulation and events during the menstrual cycle.} \label{fig:menstrual_cycle} \end{figure} Name the hormones and their source organ, which are responsible for menstrual cycle at puberty.

In a human female, the reproductive phase starts on the onset of puberty and ceases around middle age of the female. Study the graph given below regarding menstrual cycle and answer the questions that follow: \begin{figure}[h!] \centering \includegraphics[width=0.8\textwidth]{Screenshot 2025-01-17 101211.png} % Replace 'path_to_your_image.png' with the actual path to your graph image \caption{Graph showing the hormonal regulation and events during the menstrual cycle.} \label{fig:menstrual_cycle} \end{figure} For successful pregnancy, at what phase of the menstrual cycle can an early embryo (up to 3 blastomeres) be implanted in the uterus (IUT) of a human female who has opted for Assisted Reproductive Technology (ART)? Support your answer with a reason.