(a) Make a labelled diagram of the female reproductive organ of a (i) flowering plan (ii) mammal (man) . (b) State the functions of any two of the labelled ...

Answer Details

(a) Labelled diagrams of the female reproductive organs

(i) Female reproductive organ of a flowering plant (the carpel / pistil): The diagram below is a longitudinal (vertical) section through a single carpel, showing the parts that make up the female organ.

(ii) Female reproductive organ of a mammal (human female): The diagram below is a front (anterior) view of the human female reproductive system.

(b) Functions of any two of the labelled parts

In (a)(i) - flowering plant:

• Stigma: receives the pollen grains during pollination and provides a sticky, moist surface that traps them and stimulates them to germinate.
• Ovary: encloses and protects the ovules; after fertilisation it develops into the fruit while the ovules become seeds.

(Other acceptable parts: the style is the passage-way through which the germinating pollen tube grows down to reach the ovule; the ovule develops into the seed after fertilisation; the placenta attaches the ovule to the ovary wall and nourishes it.)

In (a)(ii) - mammal:

• Ovary: produces the female gametes (ova) and secretes the female sex hormones oestrogen and progesterone.
• Oviduct (fallopian tube): its funnel-shaped opening receives the released ovum and carries it towards the uterus; it is the normal site of fertilisation.

(Other acceptable parts: the uterus (womb) is where the fertilised egg implants and the embryo develops until birth; the vagina receives the sperm during mating and is the birth canal through which the baby passes.)

(c) Comparison of reproduction in mammals, amphibians and birds