Aqa Gcse Biology Paper 2 Questions And Answers 100% Verified A+ Guaranteed

Examples of behavioural adaptations {Ans: Basking, migration, tool use - e.g. birds migrate, nocturnal to avoid heat of day}Why is the iris reflex needed? {Ans: To prevent light from damaging the retina.}What is reaction time? {Ans: The time it takes to respond to a stimulus}What effect does pollution have on biodiversity? {Ans: Pollution kills plants and animals which can reduce biodiversity}Explain why the function of a protein might be affected by a mutation. {Ans: Mutations in the base sequence could affect the amino acid sequence. This will change the shape of the protein. E.g. with enzymes the active site might change shape so that the substrate cannot bind.}What is the role of LH (Luteinising hormone) in the menstrual cycle? {Ans: Produced in the pituitary gland. Stimulates the release of an egg (ovulation) at day 14.}