Reproduction: Edexcel International GCSE Biology questions

Every Edexcel International GCSE Biology exam question on Reproduction (specification points 3.1–3.13), 2019–2025, with its mark scheme and examiner’s report.

All 165 questions on Reproduction, as a list

June 2025, Paper 1, Q10 (6 marks): Some species of seed will only germinate after they have been exposed to light. Design an investigation to determine if exposure to light affects germination. I
June 2025, Paper 2, Q1(d)(i) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Rivers – the arteries of the world Rivers
June 2025, Paper 2, Q1(d)(ii) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Rivers – the arteries of the world Rivers
June 2025 (R), Paper 1, Q1(b)(i) (2 marks): State two differences between asexual and sexual reproduction. (2) 1 2
June 2025 (R), Paper 1, Q1(b)(ii) (2 marks): Explain why it is an advantage for Mucor to be able to reproduce using sexual reproduction. (2)
June 2025 (R), Paper 1, Q5(a)(i) (1 mark): In which structure does ovulation occur? (1) A W B X C Y D Z
June 2025 (R), Paper 1, Q5(a)(ii) (2 marks): Explain the importance of progesterone in the menstrual cycle. (2)
June 2025 (R), Paper 1, Q5(a)(iii) (3 marks): Explain how the placenta enables a developing embryo to obtain nutrients. (3)
June 2025 (R), Paper 1, Q5(b)(ii) (5 marks): Scientists are developing a contraceptive drug to reduce fertility. The drug is tested on 25 male mice. Graph 1 shows the effect that different concentrations o
June 2025 (R), Paper 2, Q1(a) (2 marks): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Pollination in fruit trees Plants need to
June 2025 (R), Paper 2, Q1(b) (4 marks): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Pollination in fruit trees Plants need to
June 2025 (R), Paper 2, Q1(c)(ii) (2 marks): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Pollination in fruit trees Plants need to
June 2025 (R), Paper 2, Q1(d) (2 marks): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Pollination in fruit trees Plants need to
June 2025 (R), Paper 2, Q1(e) (3 marks): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Pollination in fruit trees Plants need to
June 2025 (R), Paper 2, Q1(f) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Pollination in fruit trees Plants need to
November 2024, Paper 1, Q1(a)(i) (1 mark): Which structures are the male parts of the flower? (1) A P and Q B P and R C S and T D T and U
November 2024, Paper 1, Q1(a)(ii) (1 mark): On which structure does the pollen grain germinate? (1) A P B R C S D T
November 2024, Paper 1, Q1(a)(iii) (1 mark): Which structure becomes the seed after fertilisation? (1) A P B Q C R D T
November 2024, Paper 1, Q1(b)(i) (2 marks): Describe how a strawberry plant reproduces asexually. (2)
November 2024, Paper 1, Q1(b)(ii) (4 marks): A farmer wants to produce a plant that has strawberries with a different flavour. He then wants to produce large numbers of these plants. Discuss how he can use
June 2024, Paper 1, Q2(a)(i) (1 mark): Which structure is the style? (1) A P B Q C S D T
June 2024, Paper 1, Q2(a)(ii) (1 mark): Which structure releases pollen? (1) A P B R C T D U
June 2024, Paper 1, Q2(a)(iii) (1 mark): On which structure do the pollen grains germinate? (1) A P B R C S D U
June 2024, Paper 1, Q2(b) (3 marks): This flower is insect-pollinated. Describe how structures P, R and T would be different in a wind-pollinated flower. (3) P . R T .
June 2024, Paper 1, Q2(c)(i) (1 mark): Give an example of a natural method of asexual reproduction in plants. (1)
June 2024, Paper 1, Q2(c)(ii) (1 mark): Give an example of an artificial method of asexual reproduction in plants. (1)
June 2024, Paper 1, Q2(d) (3 marks): Give three differences between asexual and sexual reproduction. (3) 1 2 3
June 2024, Paper 1, Q8(c)(ii) (2 marks): Cystic fibrosis can result in the production of thick mucus which builds up in the cervix. Explain the effect this will have on reproduction. (2)
June 2024, Paper 2, Q4(a)(i) (1 mark): Which labelled gland produces LH? (1) A W B X C Y D Z
June 2024, Paper 2, Q4(a)(ii) (2 marks): Describe the functions of LH during the menstrual cycle. (2)
June 2024, Paper 2, Q4(b) (3 marks): The diagram shows a fetus developing in a uterus. placenta uterine wall villus umbilical cord amniotic ﬂuid amniotic sac Explain how the amniotic fluid and plac
June 2024, Paper 2, Q4(c)(i) (3 marks): Calculate the percentage difference at 36 weeks of the mean mass of babies from mothers in group A compared with the mean mass of babies from mothers in group D
June 2024, Paper 2, Q4(c)(ii) (4 marks): Comment on the effect of smoking and the effect of taking mineral ion supplements on the growth of babies. Use the graph and your own knowledge to help your ans
June 2024 (R), Paper 1, Q2(a)(i) (1 mark): Which part of the flower produces pollen? (1) A V B X C Y D Z
June 2024 (R), Paper 1, Q2(a)(ii) (1 mark): Which part of the flower becomes a fruit? (1) A V B W C X D Y
June 2024 (R), Paper 1, Q2(b)(i) (3 marks): The diameter of the pollen grain in the image is 30 mm. The pollen grain has an actual diameter of 313 µm. Calculate the magnification of the pollen grain in th
June 2024 (R), Paper 1, Q2(b)(ii) (1 mark): State how the structure of the pollen grain is adapted to ensure insect pollination. (1)
June 2024 (R), Paper 1, Q2(c) (2 marks): Gardeners often reproduce plants by taking cuttings. Explain why gardeners often reproduce plants by taking cuttings instead of growing the plants from seeds. (
November 2023, Paper 1, Q8(a)(i) (1 mark): Which structure produces gametes? (1) A R B S C U D X
November 2023, Paper 1, Q8(a)(ii) (1 mark): Which structure is the site of fertilisation? (1) A R B S C W D X
November 2023, Paper 1, Q8(a)(iii) (1 mark): In which structure does the placenta usually develop? (1) A R B S C W D X
November 2023, Paper 1, Q8(b)(i) (1 mark): On the diagram draw two lines to show where the cuts are made. (1)
November 2023, Paper 1, Q8(b)(ii) (2 marks): Explain why this operation can be used as a permanent way of preventing pregnancy. (2)
November 2023, Paper 1, Q8(c) (4 marks): Female sterilisation is another operation that can be used as a permanent way of preventing pregnancy. This involves cutting and sealing the fallopian tubes (ov
November 2023, Paper 1, Q9(c)(iii) (3 marks): Stress in cattle can also affect their reproductive system, leading to damage to the placenta. Describe the role of the placenta in reproduction. (3)
June 2023, Paper 2, Q5(a)(i) (1 mark): Name the gland that produces FSH. (1)
June 2023, Paper 2, Q5(a)(ii) (1 mark): The diagram shows the changes in four hormones during the human menstrual cycle. Key A B C D Level of hormone 0 7 14 21 28 Time in days Which line represents th
June 2023, Paper 2, Q5(a)(iii) (4 marks): Describe the roles of FSH and LH in the menstrual cycle. (4) FSH LH
June 2023, Paper 2, Q5(b) (5 marks): Reproductive hormones can be used as contraceptives to prevent pregnancy. The table gives information about three different methods of hormonal contraception. P
June 2023 (R), Paper 1, Q7(a)(i) (1 mark): Where does fertilisation normally occur? (1) A B C D
June 2023 (R), Paper 1, Q7(a)(ii) (2 marks): State how oestrogen and progesterone affect structure C during the menstrual cycle. (2) oestrogen progesterone
June 2023 (R), Paper 1, Q7(b)(i) (2 marks): Describe how an embryo forms after the eggs and sperm have been mixed together. (2)
June 2023 (R), Paper 1, Q7(b)(ii) (5 marks): If more than one embryo is transferred to a uterus, IVF can result in multiple births, such as twins or triplets. Pregnancies that produce more than one baby ca
January 2023, Paper 1, Q1(a)(i) (1 mark): This apple tree is able to self-pollinate. Which is the correct transfer of pollen during pollination? (1) A P to Q B P to T C V to P D V to S
January 2023, Paper 1, Q1(a)(ii) (1 mark): Which structure does the pollen tube grow down? (1) A Q B U C V D R
January 2023, Paper 1, Q1(a)(iii) (1 mark): Which structure develops into the seed? (1) A P B S C T D V
January 2023, Paper 1, Q1(b) (3 marks): The flower from an apple tree is insect‑pollinated. Give three differences between the structure of this apple flower and the structure of a wind‑pollinated flo
January 2023, Paper 1, Q1(c) (2 marks): The seeds of many plants are surrounded by sweet‑tasting fruit. Suggest how this enables the plants to spread their seeds. (2)
January 2023 (R), Paper 1, Q7(b) (4 marks): The diagram shows a flower from the grass plant. stigma anther Explain two ways this flower is adapted for wind pollination. (4) 1 2
January 2023 (R), Paper 1, Q7(c)(i) (1 mark): State the dependent variable in this investigation. (1)
January 2023 (R), Paper 1, Q7(c)(ii) (3 marks): Explain how the results of the investigation show that this species of grass plant is able to survive in a changing environment. Use the information in the tabl
January 2023 (R), Paper 1, Q7(d)(i) (1 mark): State the name of the type of cell division used to produce new plants by asexual reproduction. (1)
January 2023 (R), Paper 1, Q7(d)(ii) (2 marks): Describe why it is an advantage for commercial growers to produce plants by asexual reproduction. (2)
January 2023 (R), Paper 2, Q5(a) (3 marks): Name the structures labelled A, B and C. (3) A B C.
January 2023 (R), Paper 2, Q5(b) (2 marks): Describe the role of structure D in reproduction. (2)
January 2023 (R), Paper 2, Q5(c)(i) (4 marks): Explain the importance of the changes in hormone M and hormone N during the menstrual cycle. (4)
January 2023 (R), Paper 2, Q5(c)(ii) (2 marks): Other hormones are involved in the menstrual cycle. Describe the role of one other named hormone in the menstrual cycle. (2)
June 2022, Paper 1, Q1(a)(ii) (1 mark): Which gland produces progesterone? (1) A B C D
June 2022, Paper 1, Q5(a)(i) (3 marks): Describe how structures W, X and Y are adapted for wind pollination. (3)
June 2022, Paper 1, Q5(a)(ii) (2 marks): Structures W, X and Y are adapted for wind pollination. Give two other differences between wind-pollinated flowers and insect-pollinated flowers. (2) 1 2
June 2022, Paper 1, Q5(b) (5 marks): Wind-pollinated flowers often cause an allergic response in people. This is known as hay fever. Most people in the United Kingdom who get hay fever have the sym
June 2022, Paper 1, Q10 (6 marks): There is a relationship between the colour of a flower and pollination by insects. Design an investigation to find out if the colour of a flower affects how att
June 2022 (R), Paper 1, Q9(a)(i) (2 marks): Give the names of structures X and Y. (2) X. Y
June 2022 (R), Paper 1, Q9(a)(ii) (3 marks): Explain how two structures, present in the diagram, show how the flower is pollinated. (3)
June 2022 (R), Paper 1, Q9(b)(ii) (3 marks): Explain the difference in the carbohydrate composition of the ungerminated seeds and the germinating seeds. (3)
June 2022 (R), Paper 1, Q9(b)(iii) (2 marks): Explain why the jars used in the investigation are not sealed. (2)
June 2022 (R), Paper 2, Q3(c) (3 marks): Cells in the human placenta also have microvilli. Describe the role of the human placenta. (3)
June 2022 (R), Paper 2, Q5(a) (6 marks): The table gives some information about different hormones. Effect on Organ that Location of Hormone target cells releases hormone target cells and tissues FSH g
June 2022 (R), Paper 2, Q6(b) (3 marks): Pieraz was castrated (had his testicles removed) at a young age. Explain why this stopped him reproducing normally but did not stop him being used to produce a
January 2022, Paper 1, Q2(a)(i) (1 mark): Which of these is the name of structure P? (1) A anther B filament C stigma D style
January 2022, Paper 1, Q2(a)(ii) (1 mark): Which of these is the name of structure Q? (1) A leaf B petal C stem D style
January 2022, Paper 1, Q2(a)(iii) (1 mark): On which structure do pollen grains germinate? (1) A P B Q C R D S
January 2022, Paper 1, Q2(b) (3 marks): Describe how the structures of P, Q and S would differ in a wind-pollinated flower. (3)
January 2022, Paper 1, Q2(c)(i) (1 mark): Give one natural method that plants use to reproduce asexually. (1)
January 2022, Paper 1, Q2(c)(ii) (1 mark): Give one artificial method that a plant grower may use to reproduce a plant asexually. (1)
January 2022, Paper 1, Q2(c)(iii) (2 marks): Suggest why a plant grower may choose to reproduce a plant asexually rather than allowing the plant to reproduce sexually. (2)
January 2022, Paper 1, Q4(a)(i) (2 marks): Calculate the percentage of mothers aged 19 years and under who smoked during pregnancy. (2) percentage (%) =
January 2022, Paper 1, Q4(a)(ii) (2 marks): Determine the ratio of non-smokers to smokers used in the study. Give the ratio as the nearest whole number (n) in the form n:1 (2) ratio = : 1
January 2022, Paper 1, Q4(b) (6 marks): A student examines this data and concludes that smoking is the main factor that causes low birth mass. Use the data and your own biological knowledge to comment
January 2022 (R), Paper 1, Q6(a)(i) (1 mark): Which label shows where ovulation occurs? (1) A B C D
January 2022 (R), Paper 1, Q6(a)(ii) (1 mark): Which label shows where fertilisation usually occurs? (1) A B C D
January 2022 (R), Paper 1, Q6(b)(i) (2 marks): Hormones X and Y are produced by the ovaries. Name X and Y. (2) X Y
January 2022 (R), Paper 1, Q6(b)(ii) (2 marks): Explain the function of hormone X during the menstrual cycle. (2)
January 2022 (R), Paper 1, Q6(c) (3 marks): The diagram shows a human fetus developing in the uterus. placenta uterus lining villi umbilical cord amniotic fluid amniotic sac fetus Explain how the structur
January 2022 (R), Paper 2, Q1(a) (2 marks): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Moving plants Flowering plants reproduce
January 2022 (R), Paper 2, Q1(b)(i) (3 marks): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Moving plants Flowering plants reproduce
January 2022 (R), Paper 2, Q1(b)(ii) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Moving plants Flowering plants reproduce
January 2022 (R), Paper 2, Q1(c) (3 marks): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Moving plants Flowering plants reproduce
January 2022 (R), Paper 2, Q1(d) (2 marks): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Moving plants Flowering plants reproduce
January 2022 (R), Paper 2, Q1(e) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Moving plants Flowering plants reproduce
January 2022 (R), Paper 2, Q1(f) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Moving plants Flowering plants reproduce
January 2022 (R), Paper 2, Q1(g) (3 marks): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Moving plants Flowering plants reproduce
November 2021, Paper 1, Q8(a) (3 marks): Describe how asexual reproduction differs from sexual reproduction. (3)
November 2021, Paper 1, Q8(b)(i) (1 mark): What is the site of fertilisation? (1) A B C D
November 2021, Paper 1, Q8(b)(ii) (1 mark): Where does the fetus usually develop? (1) A B C D
November 2021, Paper 1, Q8(b)(iii) (4 marks): Describe the role of the hormones produced by structure B. (4)
November 2021, Paper 1, Q8(c)(i) (1 mark): Calculate the mean number of sperm released in one ejaculation from men aged 40–43 (1) mean number of sperm = million
November 2021, Paper 1, Q8(c)(ii) (2 marks): Explain why mean number of sperm released is a better measure of fertility than either mean semen volume or mean sperm concentration. (2)
November 2021, Paper 1, Q8(c)(iii) (2 marks): Calculate the percentage decrease in mean number of sperm between men aged 37–39 and men aged 48–72 (2) percentage change = %
November 2021, Paper 2, Q2(a)(i) (1 mark): Which part of the flower makes pollen grains? (1) A B C D
November 2021, Paper 2, Q2(a)(ii) (1 mark): What part of the flower is the stigma? (1) A B C D
November 2021, Paper 2, Q2(b) (3 marks): After a pollen grain lands on the stigma of a flower, a pollen tube grows. Explain the role of the pollen tube. (3)
November 2021, Paper 2, Q2(c)(i) (2 marks): Calculate the difference between the mean rate of pollen tube growth in the control solution and the mean rate of pollen tube growth in the actinomycin D soluti
November 2021, Paper 2, Q2(d) (3 marks): Describe a method the scientist could use to observe pollen grains. (3)
June 2021, Paper 1, Q7(c) (4 marks): The graphs show changes in the concentrations of the hormones testosterone and oestrogen in child R and in child S between the ages of 11 to 15. 100 500 400 80
June 2021, Paper 2, Q1(a) (2 marks): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Male contraception Hormonal contraception
June 2021, Paper 2, Q1(b)(i) (2 marks): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Male contraception Hormonal contraception
June 2021, Paper 2, Q1(b)(ii) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Male contraception Hormonal contraception
June 2021, Paper 2, Q1(b)(iii) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Male contraception Hormonal contraception
June 2021, Paper 2, Q1(c)(i) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Male contraception Hormonal contraception
June 2021, Paper 2, Q1(c)(ii) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Male contraception Hormonal contraception
June 2021, Paper 2, Q1(c)(iii) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Male contraception Hormonal contraception
June 2021, Paper 2, Q1(d) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Male contraception Hormonal contraception
June 2021, Paper 2, Q1(e) (2 marks): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Male contraception Hormonal contraception
June 2021, Paper 2, Q1(f) (4 marks): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Male contraception Hormonal contraception
January 2021, Paper 1, Q1(c) (2 marks): The acrosome contains digestive enzymes. Suggest the function of the acrosome. (2)
January 2021, Paper 1, Q1(d) (2 marks): Describe the route taken by a sperm cell from when it enters the woman’s body to the site of fertilisation of the egg. (2)
January 2021, Paper 1, Q7(a)(i) (1 mark): Describe how the scientists could tell if a maize seed had germinated. (1)
January 2021, Paper 1, Q7(a)(ii) (2 marks): The scientists measured the germination after 12 days. State two other abiotic variables that the scientists need to control in their investigation. (2) 1 2
January 2021, Paper 1, Q7(b)(i) (5 marks): Plot a line graph to show the effect of concentration of salt solution on germination. Use a ruler to join your points with straight lines. (5)
January 2021 (R), Paper 1, Q8(a) (1 mark): Which structure in flowers contains pollen grains? (1) A anther B ovary C petal D sepal
January 2021 (R), Paper 1, Q8(b)(i) (2 marks): Pollen grains are deposited on the stigma and grow tubes down the style. Suggest how style tissue helps the tube to grow. (2)
January 2021 (R), Paper 1, Q8(b)(ii) (3 marks): The graph shows the change in the length of a pollen tube over a 180 minute period. 6.00 5.00 4.00 Length of 3.00 pollen tube in mm 2.00 1.00 0.00 0 60 120 180
January 2021 (R), Paper 2, Q1(d) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Haemolytic disease Haemolysis is the term
January 2021 (R), Paper 2, Q1(g) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Haemolytic disease Haemolysis is the term
January 2021 (R), Paper 2, Q3(a) (1 mark): Which row gives the correct source for each hormone? (1) Source of FSH Source of LH A ovary pituitary B ovary ovary C pituitary pituitary D pituitary ovary
January 2021 (R), Paper 2, Q3(b) (2 marks): The graph shows the concentration of LH in the blood of a woman when she is unlikely to become pregnant and when she is likely to become pregnant. 50 40 concent
January 2021 (R), Paper 2, Q3(c) (4 marks): Describe the roles of the hormones FSH and LH. (4) FSH LH
November 2020, Paper 1, Q2 (8 marks): The passage describes reproduction in flowering plants. Complete the passage by writing a suitable word in each blank space. (8) Flowers are organs that allow p
November 2020, Paper 2, Q5(a) (6 marks): The table gives information about some hormones involved in the menstrual cycle. Complete the table by giving the missing information. (6) Name of structure tha
November 2020, Paper 2, Q5(b) (1 mark): State what is meant by the term menstruation. (1)
November 2020, Paper 2, Q5(c) (3 marks): A girl starts to ovulate at the age of 12 years and continues to ovulate until she reaches the age of 51 years. [Assume her menstrual cycle is 28 days and she r
November 2020, Paper 2, Q5(d) (1 mark): Give a reason why a female does not produce as many offspring as the number of eggs she releases. (1)
November 2020 (R), Paper 2, Q1(a) (1 mark): Read the passage below. Use the information in the passage and your own knowledge to answer the questions that follow. Toystory Toystory is a bull who was born
January 2020, Paper 1, Q10(a)(i) (3 marks): Name the parts labelled A, B and C. (3) A B C
January 2020, Paper 1, Q10(a)(ii) (2 marks): On the diagram, draw the path the pollen tube takes after the pollen grain has germinated. (2)
January 2020, Paper 1, Q10(a)(iii) (2 marks): Describe what happens to the structures in part C after fertilisation. (2)
January 2020, Paper 1, Q10(b)(i) (2 marks): Calculate the percentage increase in the number of seeds that germinate in wet and cold conditions compared to the number of seeds that germinate in wet and war
January 2020, Paper 1, Q10(b)(ii) (2 marks): Suggest why fewer seeds germinate when they are stored in wet and warm conditions than in the other conditions. (2)
January 2020, Paper 1, Q10(b)(iii) (1 mark): Give one observation that shows a seed has germinated. (1)
January 2020 (R), Paper 1, Q1(b) (1 mark): Which organ releases progesterone? (1) A the brain B the ovary C the pituitary D the testis
January 2020 (R), Paper 2, Q3(c)(i) (1 mark): Name the cell in semen that fertilises the egg. (1)
January 2020 (R), Paper 2, Q3(c)(ii) (4 marks): Explain what the scientists should do with the zygote so that it develops into a fetus. (4)
January 2020 (R), Paper 2, Q6(c)(ii) (2 marks): Tube T is used for excretion and reproduction in males, but only for excretion in females. Explain this difference in function. (2)
June 2019, Paper 1, Q6(a)(i) (1 mark): Describe the role of a sperm cell. (1)
June 2019, Paper 1, Q6(b)(i) (2 marks): The sample of semen from a rat given a nicotine concentration of 1.0 mg per kg contains 5.8 × 107 sperm cells. Calculate the number of damaged sperm cells in th
June 2019, Paper 1, Q6(b)(ii) (5 marks): The scientist concludes that cigarette smoking could make male humans infertile. Discuss this conclusion. (5)
June 2019, Paper 1, Q10(a)(i) (1 mark): Which hormone causes the development of secondary sexual characteristics in girls? (1) A adrenaline B oestrogen C progesterone D testosterone
June 2019, Paper 2, Q5(c)(i) (4 marks): The table lists the four hormones involved in controlling the menstrual cycle. It also shows the source of secretion and a function of each hormone. Complete th
June 2019, Paper 2, Q5(c)(ii) (3 marks): The chart shows the changes in the levels of the four hormones during the menstrual cycle. Key P Q menstruation ovulation R S Level of hormone 0 7 14 21 28 Time
June 2019 (R), Paper 1, Q2(c)(ii) (4 marks): To make sure their conclusion is valid, the scientists control abiotic variables while the seeds are germinating. Discuss two abiotic variables that the scienti
June 2019 (R), Paper 2, Q6(a)(i) (1 mark): Give the name of this hormone. (1)
June 2019 (R), Paper 2, Q6(a)(ii) (1 mark): State what is meant by the term ovulation? (1)
June 2019 (R), Paper 2, Q6(b) (1 mark): Give the name of hormone D. (1)
June 2019 (R), Paper 2, Q6(c) (1 mark): State the source of hormones C and D. (1)

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