The malarial parasite reproduces asexually inside a human host and sexually inside a mosquito.
A parasite with a particular genetic make-up can survive medicine P. While medicine P continues to be used, this parasite reproduces asexually inside a human host.
Later, parasites from this population reproduce sexually inside mosquitoes. Their offspring enter new human hosts, where a different medicine, medicine Q, is used for many generations of the parasite.
Explain how asexual reproduction maintains the population's ability to survive medicine P.
Explain how sexual reproduction can lead to a larger proportion of the parasite population surviving medicine Q over several generations.
Producing gametes for sexual reproduction uses energy. Give one disadvantage of this to the parasite.
92 exam-style questions on Edexcel GCSE Biology 3.1 Reproduction and meiosis, covering 3.1.1 Advantages and disadvantages of reproduction and 3.1.2 Role of meiotic cell division. Each one has a worked solution and a mark scheme showing where the marks go.