Biolgy Unit 2 0.0 / 5 ? BengaliEverythingGCSEEdexcel Created by: danielleCreated on: 15-04-19 15:08 1062953187 Across 1. What plays an active role in the transmission of the parasite and may also be the host? (1, 6) 2. What is both Ifluenza and HIV caused by? (7) 7. Explain both populations in relation to Environment, Maturation Time, Lifespan, Death Rate, No. of offsrping produced per reproductive episode, No. of reproductions in lifetime, Timing of 1st reproduction, Size of offspring or eggs & Parental care (3, 5) 8. Rate of evolution can be rapid when selection pressures are high or low? (4) Down 2. How do ectoparasites such as ticks and lice usually transmit from host to host? (3, 6, 7) 3. What is Turbuculosis caused by? (8) 5. Give an example of an insect in which sex is determined through a set of specific chromosomes- the Sex Chromosomes (X & Y) (2, 10) 6. Describe the costs and benefits of eternal & internal fertilisation. (3, 6, 5) 9. Describe what happens during Meosis 1. (4, 2, 4, 5) 10. Describe what happens during Meosis 2. (4, 2, 4, 5)
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