Question detail
Which option gives the correct cause-and-effect relationship for Reproduction, Advantages and disadvantages of sexual and asexual reproduction (biology only): students must explain why organisms may reproduce by sexual or asexual methods depending on circumstances.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reproduction
Question
- A. Correct cause and effect: Mitosis maintains chromosome number; meiosis halves chromosome number. This matches Advantages and disadvantages of sexual and asexual reproduction (biology only) because students must explain why organisms may reproduce by sexual or asexual methods depending on circumstances.
- B. Reversed cause: Claiming meiosis is used for body growth. This would blur Mitosis vs meiosis instead of testing Advantages and disadvantages of sexual and asexual reproduction (biology only).
- C. Missing link: Claiming mitosis produces gametes. This misses the objective focus on explain why organisms may reproduce by sexual or asexual methods depending on circumstances.
- D. Different process: It moves into a neighbouring Unit 4.6 idea rather than Reproduction / Advantages and disadvantages of sexual and asexual reproduction (biology only).
Answer
The correct option is Correct cause and effect: Mitosis maintains chromosome number; meiosis halves chromosome number. This matches Advantages and disadvantages of sexual and asexual reproduction (biology only) because students must explain why organisms may reproduce by sexual or asexual methods depending on circumstances.. It is the only option that keeps Mitosis vs meiosis separate and answers the approved learning objective in Advantages and disadvantages of sexual and asexual reproduction (biology only).
Explanation
The correct option is Correct cause and effect: Mitosis maintains chromosome number; meiosis halves chromosome number. This matches Advantages and disadvantages of sexual and asexual reproduction (biology only) because students must explain why organisms may reproduce by sexual or asexual methods depending on circumstances.. Correct cause and effect: Mitosis maintains chromosome number; meiosis halves chromosome number. This matches Advantages and disadvantages of sexual and asexual reproduction (biology only) because students must explain why organisms may reproduce by sexual or asexual methods depending on circumstances. is correct because Mitosis maintains chromosome number; meiosis halves chromosome number. The learning objective says students must explain why organisms may reproduce by sexual or asexual methods depending on circumstances, so the answer must stay inside Advantages and disadvantages of sexual and asexual reproduction (biology only). The alternative options are wrong because they either claiming meiosis is used for body growth., claiming mitosis produces gametes., or drift away from mitosis questions must focus on identical cells, growth, repair, asexual reproduction, or maintained chromosome number..
Common mistake
Choosing the wrong reproduction method
Students often assume that an organism will always use the method that gives the most offspring, ignoring environmental or resource constraints.
Explain that organisms select sexual or asexual reproduction based on factors such as resource availability, need for genetic variation, and environmental stability. Provide examples where asexual reproduction is favoured in stable conditions and sexual reproduction is favoured when change or competition requires variation.
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