48 exam-style questions on Reproduction — topic D3.1 of Continuity and change in the IB Biology syllabus — with answers and explanations. Samples below; the full set is free with an account.
Distinguish the key advantage of sexual reproduction over asexual reproduction.
Answer: It generates genetic variation
Sexual reproduction combines gametes from two parents, generating genetic variation that can aid adaptation; asexual reproduction produces clones.
Identify the process that produces gametes and reduces the chromosome number by half.
Answer: Meiosis
Meiosis is a reduction division producing four haploid cells from one diploid cell, essential for gamete formation.
Outline the immediate hormonal trigger for ovulation in the human menstrual cycle.
Answer: A surge in luteinizing hormone (LH)
High oestrogen from the mature follicle triggers a positive-feedback LH surge from the pituitary, which causes ovulation around day 14.
Determine the main function of progesterone during the luteal phase of the menstrual cycle.
Answer: To maintain the endometrium
Progesterone maintains the thick, vascularised endometrium ready for implantation; a fall in progesterone leads to menstruation.
Which features are typical of a wind-pollinated flower rather than an insect-pollinated flower?
Answer: Feathery stigmas and much light pollen
Wind-pollinated flowers have exposed feathery stigmas and produce abundant small, light pollen; insect-pollinated flowers rely on colour, scent, nectar and sticky pollen.
Outline where fertilization normally occurs in the human female reproductive system.
Answer: In the oviduct
Sperm meet and fuse with the egg in the oviduct; the resulting zygote then travels to the uterus for implantation.
That was 6 of 48 Reproduction questions.
Practise all 48 freeStateAO1 · 1–2 marks
One word or one short sentence. No explanation, no working: the mark is for the fact itself.
OutlineAO2 · 1–4 marks
A brief account or summary: the main points in two or three sentences, no evaluation.
DrawAO1 · 1–2 marks
A labelled, accurate drawing with a ruler where lines are straight; axes and units on a graph.
48 Reproduction questions — free with an account. Spaced repetition, streaks and full exam simulations included.
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