Human and plant reproductionIB MYP Sciences: Subtopic test

1. 1
   A health teacher in Nairobi is explaining to her class how a pregnancy begins, from the release of an egg from the ovary to the embryo settling in the uterus.

   (a)

   In which structure does fertilisation normally take place?

   [1 mark]

   • AThe oviduct
   • BThe uterus
   • CThe ovary
   • DThe vagina

   (b)

   The embryo becomes embedded in the soft lining of the uterus. What is this process called?

   [1 mark]

   • AOvulation
   • BImplantation
   • CFertilisation
   • DPollination

   (c)

   Describe what happens at fertilisation.

   [2 marks]

   Total for question 1: 4 marks

2. 2
   A school garden club in Cape Town is studying two plants growing side by side: a sunflower with large yellow petals that is visited by bees, and a wild grass with small, dull green flowers and no scent.

   (a)

   Which part of a flower produces pollen?

   [1 mark]

   • AStigma
   • BOvary
   • CAnther
   • DPetal

   (b)

   After fertilisation in the sunflower, which part of the flower develops into the fruit?

   [1 mark]

   • AAnther
   • BPetal
   • CStigma
   • DOvary

   (c)

   Explain why the grass flowers produce very large amounts of light, smooth pollen, whereas the sunflower produces much less.

   [2 marks]

   Total for question 2: 4 marks

3. 3
   An antenatal nurse in Lisbon is explaining to a group of expectant parents how a developing baby is supported inside the uterus during pregnancy.

   (a)

   Outline the role of the placenta during pregnancy.

   [3 marks]

   (b)

   The nurse advises the parents that the mother should not smoke or drink alcohol during pregnancy. Suggest why this advice is given.

   [4 marks]

   Total for question 3: 7 marks

4. 4
   Fruit growers in Sichuan, China are worried that fewer wild bees now visit their apple orchards. Some workers pollinate the blossoms by hand with small brushes. A nearby school wants to know what attracts bees to flowers, and a student suggests that bees visit brightly coloured flowers more often than pale ones.

   (a)

   Design an investigation to test the student's suggestion that bees visit brightly coloured flowers more often than pale ones.

   [6 marks]

   (b)

   Discuss and evaluate hand pollination as a way for the growers to deal with the fall in the number of bees.

   [6 marks]

   Total for question 4: 12 marks

End of questions