Aqa gcse biology paper if - Study guides, Class notes & Summaries

AQA GCSE Biology - Paper 2 Graded A+ What is homeostasis? The regulation of the conditions inside your body and cells to maintain a stable internal environment, in response to changes in both internal and external conditions Name three coordination centres The brain, the spinal cord and the pancreas What is negative feedback? When your body brings the level of something (e.g. water or temperature) back to normal if it becomes too high or too low What detects a stimulus? A receptor, e...

AQA GCSE BIOLOGY 8461/1H Paper 1 Higher Tier Version: 1.0 Final *jun2384611H01* IB/M/Jun23/E25 8461/1H For Examiner’s Use Question Mark 1 2 3 4 5 6 TOTAL Tuesday 16 May 2023 Morning Time allowed: 1 hour 45 minutes Materials For this paper you must have: • a ruler • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at the top of this page. • Answer all questions i...

AQA GCSE BIOLOGY 8461/1F Paper 1 Foundation Tier Version: 1.0 Final *jun2384611F01* IB/M/Jun23/E19 8461/1F For Examiner’s Use Question Mark 1 2 3 4 5 6 7 TOTAL Tuesday 16 May 2023 Morning Time allowed: 1 hour 45 minutes Materials For this paper you must have: • a ruler • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at the top of this page. • Answer all ques...

AQA GCSE BIOLOGY 8461/2H Paper 2 Higher Tier *236G84612H/MS* Version: 1.0 Final *jun2384612H01* IB/M/Jun23/E21 8461/2H For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 TOTAL Friday 9 June 2023 Afternoon Time allowed: 1 hour 45 minutes Materials For this paper you must have: • a ruler • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at the top of this page. ...

AQA GCSE Biology Paper 2 Graded A+ What is homeostasis? ️The maintenance of a constant internal environment. What is a stimulus? ️A change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature. What do the receptors do? ️Detect the stimulus or change in environment. What happens after the receptors? ️Receptors send messages to the CNS via the sensory neurone. What makes up the central nervous system? ️The brain or spi...

AQA GCSE BIOLOGY 8461/2F Paper 2 Foundation Tier *236G84612F/MS* Version: 1.0 Final *jun2384612f01* IB/M/Jun23/E21 8461/2F For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 TOTAL Friday 9 June 2023 Afternoon Time allowed: 1 hour 45 minutes Materials For this paper you must have: • a ruler • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at the top of this pag...

AQA GCSE Biology paper 1 latest complete test A+ Magnification equation - answers Magnification= image size/actual object size Light microscope- how many um in 1 mm - answers 1000 um light microscope- how many nm in 1 um - answers 1000 nm Light microscope- why can we see the nucleus and cell wall but not the mitochondria - answers Too small and not stained light microscope- how can we see smaller parts of cells - answers An electron microscope has muc...

AQA GCSE Biology Paper 1 Graded A+ Magnification equation ️Magnification= image size/actual object size Light microscope- how many um in 1 mm ️1000 um light microscope- how many nm in 1 um ️1000 nm Light microscope- why can we see the nucleus and cell wall but not the mitochondria ️Too small and not stained light microscope- how can we see smaller parts of cells ️An electron microscope has much more resolution and magnification What is osmosis? ️The movement of water ...

AQA GCSE BIOLOGY 8461/2F Paper 2 Foundation Tier Question Paper + Mark scheme [MERGED] June 2022 *JUNF01* IB/M/Jun22/E16 8461/2F For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 10 TOTAL Time allowed: 1 hour 45 minutes Materials For this paper you must have: • a ruler • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at the top of this page. • Answer all q...

AQA GCSE BIOLOGY 8461/1F Paper 1 Foundation Tier Version: 1.0 Final *jun2384611F01* IB/M/Jun23/E19 8461/1F For Examiner’s Use Question Mark 1 2 3 4 5 6 7 TOTAL Tuesday 16 May 2023 Morning Time allowed: 1 hour 45 minutes Materials For this paper you must have: • a ruler • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at the top of this page. • Answer all ques...