2024 aqa as biology 7401/2 paper 2 with 350 questions and correct detailed answers (verified answers) |already graded a+|| brand new!!

2024 aqa as biology 7401/2 paper 2 with 350 questions and correct detailed answers (verified answers) |already graded a+|| brand new!! What are the advantages of multi-cellular organisms?- ANSWER--able to move -able to hunt(likely to he in top if food chain) -able to adapt to environment -specialised body reigons -able to find a mate What are the disadvantages of multi-cellular organisms?- ANSWER-As they get bigger diffusion is less efficient and specialised exchange surfaces are needed How is water loss limited in insects?-ANSWER-Small surface area to volume ratio- to maximise the area over which water is lost Waterproof covering Spiracles- can open or close How is the trachea adapted?-ANSWER-Rings of cartilage to support the trachea stop it from collapsing How is the alveoli adapted?-ANSWER--200 million of them to create a large surface area (70m2) -very thin walls providing a small diffusion pathway