What structure transforms into the corpus luteum after ovulation?

The remnants of the Graafian follicle

Fill in the blank: The hormone ___ is secreted by the corpus luteum and is crucial for preparing the uterus for embryo implantation.

Progesterone

True or False: The menstrual cycle lasts exactly 28 days in all females.

False. The menstrual cycle can vary in length, typically lasting between 21 to 35 days.

What is the primary difference between asexual and sexual reproduction?

Asexual and sexual reproduction differ significantly.

• Asexual uses one organism.

• Sexual involves two gametes.

• Results in genetic diversity.

Riddle: I am formed when a male gamete meets a female gamete, creating potential for new life. What am I?

Zygote

Which phase of the menstrual cycle is characterized by the shedding of the uterine lining?

Menstrual Phase

Fill in the blank: The placenta connects the developing embryo to the mother through the ___, which contains blood vessels.

Umbilical cord

What is the process called when the embryo attaches to the endometrial lining of the uterus?

Implantation

Multiple Choice: Which of the following hormones is released before ovulation to regulate the menstrual cycle? A) Progesterone B) Testosterone C) Oestrogen D) Luteinizing Hormone

C) Oestrogen

True or False: Identical twins result from two separate fertilized eggs.

False. Identical twins result from a single fertilized egg that splits into two.

What is the typical duration of gestation in humans?

Approximately 280 days

Fill in the blank: During fertilization, the sperm uses its ___ to penetrate the outer membrane of the ovum.

Acrosome

Riddle: I act as a barrier and provide nourishment to a developing foetus, but I can also let some harmful viruses through. What am I?

Placenta

Describe the role of amniotic fluid during pregnancy.

Amniotic fluid cushions the embryo, protecting it from physical shocks and providing a stable environment for its development.