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IB Biology SL D3.1 Reproduction Questions

Practise IB Biology SL D3.1 by comparing reproduction, identifying anatomy and tracing hormones, fertilization and reproductive technology.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • compare asexual reproduction by mitosis with sexual reproduction involving meiosis and fertilization
  • identify reproductive anatomy and trace hormone control of ovarian cycles and IVF treatment
  • explain flower pollination and fertilization, then relate seed structures to germination

Covered syllabus points

D3.1.1—Sexual vs. asexual reproductionD3.1.2—Role of meiosis and gamete fusionD3.1.3—Male vs. female sexesD3.1.4—Human reproductive system anatomyD3.1.5—Ovarian and uterine cyclesD3.1.6—Fertilization in humansD3.1.7—In vitro fertilization (IVF)D3.1.8—Sexual reproduction in flowering plantsD3.1.9—Insect-pollinated flower featuresD3.1.10—Promoting cross-pollinationD3.1.11—Self-incompatibility mechanismsD3.1.12—Seed dispersal and germination

Question 1

[Maximum number: 2]

This redwood tree (Sequoia sempervirens) was blown over in 1936, but five side branches formed new roots and are now separate trees.

Three of the new trees formed from side branches of the original tree

Figure for Question 1 — IB Biology SL

If the genomes of the five new trees were sequenced, predict with a reason how similar they would be to each other.

Question 2

[Maximum number: 1]

Which of the following will promote variation in a species?

I. Meiosis
II. Fertilization
III. Natural selection

A

I only

B

II only

C

I and II only

D

I, II and III

Question 3

[Maximum number: 5]

Draw a labelled diagram of the human adult male reproductive system.

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