If the nuclei from an $8$-celled stage of an embryo are transplanted into enucleated eggs,which of the following events is likely to occur?

Which of the following statements are true about the female reproductive system?
$(A)$ Both estrogen and progesterone are necessary for development of follicle
$(B)$ Progesterone production is under the control of $LH$
$(C)$ The part of the oviduct is isthmus; has a narrow lumen and it joins the uterus
$(D)$ During pregnancy all events of the menstrual cycle stop and there is no menstruation
$(E)$ The graafian follicle ruptures to release the primary oocyte from the ovary by the process called ovulation

Which two events in the life cycle maintain the same (constant) number of chromosomes?

The prepubertal period refers to a stage of

What is the type of egg found in birds?

Select the correct sequence of events in human reproduction.