Which statement relating to gametogenesis is correct?
Sperm production occurs in the interstitial cells.
Gametogenesis in both males and females involves the process of mitosis.
The entire process of oogenesis occurs before birth.
Immature sperm cells with flagella are known as Sertoli cells.
Which statement relating to internal and external fertilisation is not correct?
External fertilisation reduces the risk of predation.
Aquatic animals often carry out external fertilisation
Internal fertilisation takes place in the female reproductive tract.
Internal fertilisation ensures that the male and female gametes are close to each other.
The following statements describe events that occur after fertilisation.
Finger-like projections grow into the uterus lining.
The fertilised egg cell divides by mitosis.
The zona pellucida breaks down.
The embryo develops into a hollow ball of cells known as a blastocyst.
Which row in the table shows the correct sequence of events?
| First event | → | → | Last event | |
| A. | III | II | I | IV |
| B. | II | IV | III | I |
| C. | II | III | IV | I |
| D. | III | IV | I | II |
Which of the following statements relating to the placenta are correct?
The surface area of the placenta increases as the foetus grows.
Maternal and fetal blood mixes in the intervillous spaces.
I and II only.
I and III only.
II and III only.
III only.
The diagram below shows an ovum.
Which row correctly identifies structures 1-4 in the diagram? Note that the term mitochondrion is the singular for mitochondria.
| 1 | 2 | 3 | 4 | |
| A. | Follicle cells | Cell wall | Diploid nucleus | Mitochondrion |
| B. | Follicle cells | Zona pellucida | Haploid nucleus | Mitochondrion |
| C. | Zona pellucida | Follicle cells | Haploid nucleus | Cortical granule |
| D. | Follicle cells | Zona pellucida | Haploid nucleus | Cortical granule |
